Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (1615)
- Environmental Sciences (1349)
- Ecology and Evolutionary Biology (1014)
- Marine Biology (833)
- Natural Resources and Conservation (759)
-
- Natural Resources Management and Policy (676)
- Biology (604)
- Terrestrial and Aquatic Ecology (578)
- Water Resource Management (532)
- Social and Behavioral Sciences (489)
- Natural Resource Economics (457)
- Oceanography and Atmospheric Sciences and Meteorology (450)
- Environmental Monitoring (424)
- Population Biology (420)
- Biodiversity (409)
- Public Affairs, Public Policy and Public Administration (339)
- Environmental Policy (325)
- Environmental Indicators and Impact Assessment (305)
- Law (290)
- Sustainability (271)
- Business (244)
- Environmental Law (217)
- Water Law (208)
- Natural Resources Law (205)
- State and Local Government Law (195)
- Environmental Health and Protection (180)
- Earth Sciences (162)
- Institution
-
- Department of Primary Industries and Regional Development, Western Australia (1028)
- University of Nebraska - Lincoln (721)
- Old Dominion University (243)
- University of Colorado Law School (214)
- Utah State University (161)
-
- National Taiwan Ocean University (142)
- Marshall University (112)
- Bemidji State University (108)
- University of Rhode Island (93)
- South Dakota State University (90)
- University of Arkansas, Fayetteville (71)
- The University of Southern Mississippi (70)
- Eastern Illinois University (67)
- World Maritime University (48)
- University of Nevada, Las Vegas (45)
- Louisiana State University (39)
- SIT Graduate Institute/SIT Study Abroad (39)
- Cal Poly Humboldt (38)
- University of South Alabama (38)
- Portland State University (31)
- Chapman University (30)
- Nova Southeastern University (29)
- Ateneo de Manila University (26)
- University of South Florida (25)
- Central Washington University (23)
- Eastern Washington University (23)
- University of Connecticut (21)
- Western Kentucky University (21)
- West Virginia University (20)
- University of North Florida (19)
- Keyword
-
- Western Australia (387)
- Fisheries (231)
- Aquaculture (197)
- Fishery management (143)
- Fish (130)
-
- Experiments (98)
- Limnology (97)
- Aquatic ecology (96)
- Freshwater biology (91)
- Recreational fishing (90)
- Climate change (82)
- MN (82)
- Fisheries Management (75)
- Growth (74)
- Colorado (72)
- Fisheries management (71)
- Minnesota (69)
- Commercial Fishing (68)
- California (67)
- Recreational Fishing (67)
- Conservation (61)
- West (61)
- Water quality (56)
- Fishery (54)
- Fishing (54)
- Water law (48)
- Western water law (45)
- Department of Primary Industries and Regional Development (44)
- Sustainability (42)
- United States (42)
- Publication Year
- Publication
-
- Fisheries Management Papers (337)
- Fisheries Research Reports (335)
- United States Fish and Wildlife Service: Publications (269)
- Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications (167)
- Journal of Marine Science and Technology–Taiwan (142)
-
- Theses, Dissertations and Capstones (110)
- Fisheries Occasional Publications (94)
- Journal of Earth and Life Science (85)
- Marine Affairs Theses and Major Papers (81)
- Fisheries Research Articles (79)
- Biological Sciences Faculty Publications (72)
- Watershed Sciences Faculty Publications (72)
- Electronic Theses and Dissertations (70)
- Masters Theses (68)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (66)
- Journal of the Arkansas Academy of Science (58)
- Investigations of the Ichthyofauna of Nicaraguan Lakes (55)
- Status Reports of the Fisheries and Aquatic Resources (52)
- United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications (51)
- Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts (46)
- Biology Faculty Publications (44)
- OES Faculty Publications (43)
- World Maritime University Dissertations (41)
- Independent Study Project (ISP) Collection (37)
- OES Theses and Dissertations (36)
- Cal Poly Humboldt theses and projects (35)
- CCPO Publications (34)
- University Faculty and Staff Publications (32)
- Publications (WR) (30)
- Natural Resource Management Faculty Publications (29)
- Publication Type
- File Type
Articles 3991 - 4020 of 4307
Full-Text Articles in Aquaculture and Fisheries
Avian Mortality Caused By A September Wind And Hail Storm, Kenneth F. Higgins, Michael A. Johnson
Avian Mortality Caused By A September Wind And Hail Storm, Kenneth F. Higgins, Michael A. Johnson
United States Fish and Wildlife Service: Publications
In recent study of nonhunting mortality of wild waterfowl, Stout and Cornwell (1976) identified weather as one of the more significant causal agents. This paper describes an occurrence of spectacular avian mortality caused by a severe thunderstorm in North Dakota on 8 September 1977.
The storm was associated with a low pressure system in South Dakota. It developed about Noon CST north of Dickinson, traveled eastward and generally north of highway 1-94, and continued into Minnesota at about 5:00 p.m. CST. The system moved at about 60 mph (97 km/h) over a 300 mile (483 km) stretch of the state; …
Loss Of Larval Fish By Epilimnial Discharge From Degray Lake, Arkansas, Thomas E. Moen, Michael R. Dewey
Loss Of Larval Fish By Epilimnial Discharge From Degray Lake, Arkansas, Thomas E. Moen, Michael R. Dewey
Journal of the Arkansas Academy of Science
Weekly samples of larval fish were collected from water discharged from the epilimnion of DeGray Lake into the tailwaters, for power generation, from April through August, 1976 and 1977. Peak rates of loss measured were 1.4 larvae/m³ in May, 1976 and 2.7/m³ in April, 1977. Sunfish, shad and crappie made up 97% of an estimated 83.3 million fish lost in 1976, and 98% of 122.4 million lost in 1977. The most critical period for larval fish loss extended from the last week of April to the first week of June. No definite relationships were noted between length of the power …
The Amateur Marron Fishery In Western Australia, N. M. Morrissy
The Amateur Marron Fishery In Western Australia, N. M. Morrissy
Fisheries Research Bulletins
The amateur fishery in south-western Australia for marron, Cherax tenuimanus, the third largest Australian and world freshwater crayfish, is described, including the history of management regulations and the legal methods of capture of marron (scoop nets, drop nets and snares) in rivers and dams. Catch and effort data were obtained from research log books over the period 1971 to 1976. From the inception of the Inland Fisherman's License, largely intended for marron, in 1970, the number of licenses rose steeply from 6,500 to 20,000 by 1975. The calculated total annual catch by the 1974-75 and 1975-76 seasons was about 470,000 …
Early History Of The Shark Bay Prawn Fishery, Western Australia, R. J. Slack-Smith
Early History Of The Shark Bay Prawn Fishery, Western Australia, R. J. Slack-Smith
Fisheries Research Bulletins
The factors leading to the development of the prawn fishery in Shark Bay have been discussed, and a history and account of the fishery to 1969 has been presented. A description has been given of the management measures introduced to control the growth of the fishery, together with some of the underlying rationale behind these measures.
Review Of Helminths Of Fish-Eating Birds Of The Palaearctic Region. I. Nematoda, Glenn L. Hoffman
Review Of Helminths Of Fish-Eating Birds Of The Palaearctic Region. I. Nematoda, Glenn L. Hoffman
United States Fish and Wildlife Service: Publications
The title is accurate but the subject is a little misleading. One would expect that the fish-eating birds will acquire nematodes from the fish they eat. On the contrary, with one exception, Eustrongylides tubifex, as far as is known none of these nematodes use fish as normal intermediate hosts. A few species use fish as paratenic hosts. The book consists of an Introduction (2 pages), General Account of Nematodes (4 pages), the Systematic Part (233 pages), List of Fish-Eating Birds and Their Nematodes (22 pages), References (29 pages) and Index (13 pages). There are keys to families, genera, and …
Fish Of Lake Mead And Lake Mohave, Robert C. Allan, Dennis L. Roden
Fish Of Lake Mead And Lake Mohave, Robert C. Allan, Dennis L. Roden
Publications (WR)
This publication offers an in-depth study of the fish and other organisms that live in Lakes Mead and Mohave. The history and background of the two lakes is offered, as well as information about diseases, parasites, and unusual fish occurrences. Food sources, predation and competition are also discussed.
Description Of The Larval Development Of Squilla Empusa Say (Crustacea Stomatopoda) With Aspects Of Larval Ecology In Chesapeake Bay, Steven Gaines Morgan
Description Of The Larval Development Of Squilla Empusa Say (Crustacea Stomatopoda) With Aspects Of Larval Ecology In Chesapeake Bay, Steven Gaines Morgan
OES Theses and Dissertations
Larvae of Sguilla empusa were collected from the plankton and were reared in the laboratory to describe the pelagic larval development and the postlarval stage. Nine pelagic stages are passed through before the postlarval stage is attained.
The larvae reared for descriptive purposes were subjected to sixteen combinations of temperature and salinity to determine their tolerance to the two parameters. Larvae survived longer and molted more frequently when reared at 25°/oo and 20°C or 25°C, which corresponds to the natural conditions of the Chesapeake Bay when the larvae were collected.
A three year planktonic survey conducted in the lower region …
Seasonal Abundance & Diversity Of Fishes At Three Stations On The Middle Fork Of Drake's Creek, Warren & Allen Counties, Kentucky, David Bell
Masters Theses & Specialist Projects
A total of 7,485 fish, representing 49 species, 25 genera, and 11 families, were electroshocked from three stations on the Middle Fork of Drake's Creek during the period January, 1972 through January, 1973. Community structure was influenced by seasonal changes in both numbers of species and numbers of individuals. The number of species per collection was at its highest, at all stations, during the month of September. The total number of species and individuals collected at each station progressively increased toward the upstream areas. Eleven of the forty-nine species collected during the course of the study provided 91.8% of the …
State Of The Fisheries Report 1976, Department Of Fisheries And Wildlife, Western Australia
State Of The Fisheries Report 1976, Department Of Fisheries And Wildlife, Western Australia
Status Reports of the Fisheries and Aquatic Resources
The total value of the fisheries of Western Australia is the highest of any of the States, and the Western Australian rock lobster fishery is the most valuable single fishery in Australia.
The Effects Of Temperature And Salinity On The Larval Development Of The Grass Shrimp, Palaemonetes Pugio Holthuis Reared In The Laboratory, William Ray Floyd Iii
The Effects Of Temperature And Salinity On The Larval Development Of The Grass Shrimp, Palaemonetes Pugio Holthuis Reared In The Laboratory, William Ray Floyd Iii
OES Theses and Dissertations
Palaemonetes pugio larvae, obtained by induced breeding of adults collected in the late fall of 1975 from the Lafayette River, Norfolk, Virginia, were reared in the laboratory using a six temperature by seven salinity factorial design in order to determine the effects of these factors on larval development. Test conditions involved temperature levels ranging from 10°C to 32.5°C and salinity levels from 5°/oo to 35°/oo. At each temperature-salinity condition, 36 larvae were reared individually in 25 ml of artificial seawater containing 25 mg/kg of polyethylene oxide. Food consisted of Artemia nauplii at a concentration of 30/ml of culture water. From …
Aboriginal Exploitation Of Marine Food Resources, Alan J. Osborn
Aboriginal Exploitation Of Marine Food Resources, Alan J. Osborn
Department of Anthropology: Theses and Student Research
Anthropological interest in human exploitation of resources has increased considerably during the last decade. Archaeological and ethnological literature concerning man's utilization of the world's oceans is relatively abundant and there are now several on-going anthropological research programs, e.g., Aleutian Islands, Pacific Northwest Coast, California, Hawaii, Australia, New Zealand, Peru, Ecuador, Chile, and Southern Africa which focus primarily on maritime adaptations. The purpose of this study is threefold: (1) to suggest that anthropological assumptions regarding marine food resources and their use are inadequate; (2) to examine marine ecosystems with respect to structure and dynamics, primary productivity, ecological efficiencies, distributional and quantitative …
A Proposal For Renewable Resource Management In Long Island Sound, Oliver T. Edstrom
A Proposal For Renewable Resource Management In Long Island Sound, Oliver T. Edstrom
Marine Affairs Theses and Major Papers
In the United States, prior to Public Law 94-265, the Fishery Conservation and Management Act of 1976, regulation of the harvest of oceanic fishery stocks was complicated by the principles of common property resource laws founded by Grotius' dissertation on freedom of the seas. Public Law 94-265 vests ownership in the right to manage stock of fish within 200 miles of the United States' coast to the United States as trustee of that fishery resource. Within the framework of extended jurisdiction of fishery management, individual states in the republic keep and maintain control of fishery resources. within their respective territories.
Temperature And Salinity Tolerance Of The Larvae Of The Sand Shrimp, Crangon Septemspinosa (Say), Karen Lyttle Hinsman
Temperature And Salinity Tolerance Of The Larvae Of The Sand Shrimp, Crangon Septemspinosa (Say), Karen Lyttle Hinsman
OES Theses and Dissertations
The effects of temperature and salinity on the larval development of the sand shrimp, Crangon septemspinosa, were investigated in the laboratory using 30 combinations of temperature and salinity in a five by six factorial experiment. The five temperatures were 5°c, 10°c, 15°c, 20°c, and 25°c and the six salinities were 10°/oo, 15°/oo, 20°/oo, 25°/oo, 30°/oo and 35°/oo. Thirty-six larvae were used for each temperature-salinity combination. Temperature and salinity produced significant differences (1% level) in survival and the duration of larval development. Highest survival occurred at 15°c and 20°/oo. At optimum temperatures (15°c to 20°c) larvae exhibited the broadest tolerance …
Addendum To "Fishes Of The Fourche River" In North Central Arkansas, Steve M. Bounds
Addendum To "Fishes Of The Fourche River" In North Central Arkansas, Steve M. Bounds
Journal of the Arkansas Academy of Science
No abstract provided.
Distribution, Habitat Notes, And The Status Of The Ironcolor Shiner, Notropis Chalybaeus Cope, In Arkansas, Henry W. Robison
Distribution, Habitat Notes, And The Status Of The Ironcolor Shiner, Notropis Chalybaeus Cope, In Arkansas, Henry W. Robison
Journal of the Arkansas Academy of Science
Field work throughout Arkansas since 1971 and a search of museum records have yielded 35 collections of the iron color shiner, Notropis chalybaeus Cope (Cyprinidae), not previously documented in Arkansas. From these data the iron color shiner is considered to be confined to the Coastal Plain physiographic province of Arkansas below the Fall Line, becoming most abundant in the Ouachita and Red River drainages of southern Arkansas. Notes on habitat preference, species associates, and current status of N. chalybaeus within Arkansas are presented.
Growth, Mortality, Food Habits, And Fecundity Of The Buffalo River Smallmouth Bass, Raj V. Kilambi, Walter R. Robison, James C. Adams
Growth, Mortality, Food Habits, And Fecundity Of The Buffalo River Smallmouth Bass, Raj V. Kilambi, Walter R. Robison, James C. Adams
Journal of the Arkansas Academy of Science
Total length-scale radius, and length-weight relationships were determined for smallmouth bass from the Buffalo River. The back calculated lengths were used in analyzing the age-length data by the Bertalanffy growth formula. Asymptotic length and weight were estimated as 58.3 cm and 4.6 lbs, respectively. Annual mortality of 36 percent was estimated by the catch curve method. Insects (54%), fishes (16%), and crayfish (14%) were the abundant food organisms by frequency of occurrence; while fishes (64%) and crayfish (29%) were the dominant food items by the gravimetric method. Based on the gonosomatic indices and frequency distribution of ovum diameter measurements, smallmouth …
Fishes Of The Eleven Point River Within Arkansas, Michael B. Johnson, John K. Beadles
Fishes Of The Eleven Point River Within Arkansas, Michael B. Johnson, John K. Beadles
Journal of the Arkansas Academy of Science
A survey of the fishes of the Eleven Point River and its tributaries was made between 31 January 1976 and 13 February 1977. Sixty-three collections, literature records and personal communications revealed 90 species distributed among 19 families. This study revealed 31 species previously not reported for this river system. The Eleven Point River is a clear, predominantly springfed Ozark stream which is located in western Randolph County. From the Arkansas-Missouri state line, the Eleven Point River flows south for approximately 64 km before joining the Spring River. Terrain in the Arkansas portion of this river is rugged as the river …
Fishes Of Crowley's Ridge In Arkansas, Robert F. Fulmer, George L. Harp
Fishes Of Crowley's Ridge In Arkansas, Robert F. Fulmer, George L. Harp
Journal of the Arkansas Academy of Science
Crowley's Ridge is one of the six natural geographic divisions of Arkansas which rises out of the Mississippi embayment as a relatively steep, uncultivated loessial mass. The ridge is drained by a network of headwater streams which are relatively clear with alkaline pH values and uniformly low alkalinity values. Carbon dioxide values were moderate and oxygen values were adequate. The fish species collected were basically headwater in composition. Isolated groups of characteristically upland species indicate that environmental quality of adjacent deltaic streams was better at one time.
Fishes Of Sylamore Creek, Stone County, Arkansas, George C. Frazier, John K. Beadles
Fishes Of Sylamore Creek, Stone County, Arkansas, George C. Frazier, John K. Beadles
Journal of the Arkansas Academy of Science
A survey of the fishes of Sylamore Creek in northcentral Arkansas yielded a total of 15,041 specimens representing 44 species, including one hybrid, distributed among 11 families. The three most abundant fishes collected were: Notropis pilsbryi Fowler, Dionda nubila (Forbes), and Notropis telescopus (Cope), respectively. Two species, Campostoma anomalum pullum (Agassiz), and N. pilsbryi, were collected at every station. Sylamore Creek is a clear predominantely spring-fed stream that originate in the Ozark Mountains of northcentral Arkansas and empties into the White River 72.3 km above Bates vilie. Sylamore Creek is composed of two branches, North and South Sylamore, which comprise …
Fishes Of Randolph County, Arkansas, Steve M. Bounds, John K. Beadles, Billy M. Johnson
Fishes Of Randolph County, Arkansas, Steve M. Bounds, John K. Beadles, Billy M. Johnson
Journal of the Arkansas Academy of Science
A survey of the fishes of Randolph County in northcentral Arkansas was made between June 1973 and March 1977. Field collections, literature records, and museum specimens revealed the ichthyofauna of Randolph County to be composed of 128 species distributed among 24 families. Cyprinidae was the largest family, being represented by 34 species while Percidae was represented by 24 species. Randolph County is composed of Ozark Uplands and Coastal Plain areas. All of the stream systems flow into the Black River system with the exception of Village Creek in the southeastern corner of the county which flows into White River. The …
Vibriosis In Fish, G. L. Bullock
Vibriosis In Fish, G. L. Bullock
United States Fish and Wildlife Service: Publications
Fish vibriosis is a systemic disease of marine, estuarine, and some freshwater fishes, caused by bacteria of the genus Vibrio (Ross et al. 1968, Ghittino et al. 1972). The disease has been known for centuries; outbreaks along the Italian coast were recorded as early as the 1500's. Terms such as "red pest," "red boil," "red plague," or "saltwater furunculosis" have been applied to vibrio infections, but vibriosis is a more specific term and is now used by most fishery workers. With the rapid development of mariculture, vibriosis has become a major cause of fish loss--sometimes to the extent of being …
Upland Nesting Of American Bitterns, Marsh Hawks, And Short-Eared Owls, Harold F. Duebbert, John T. Lokemoen
Upland Nesting Of American Bitterns, Marsh Hawks, And Short-Eared Owls, Harold F. Duebbert, John T. Lokemoen
United States Fish and Wildlife Service: Publications
Nests of American Bitterns (Botaurus lentiginosus), marsh hawks (Circus cyaneus), and short-eared owls (Asio flammeus) are usually found in wetland habitats. Although large marshes containing dense stands of bulrushes (Scirpus), cattails (Typha), or other wetland vegetation are favored nesting cover, these birds have also been reported to nest in stands of tall, dense shrubs and grasses on the upland (Bent 1961, 1963; Palmer 1962; Sealy 1967; Stewart 1975). During 1968-74, we regularly found upland nests of these three species while conducting duck nesting studies in planted fields of undisturbed grass-legume …
Fisheries Report No 28 - The Western Rock Lobster Fishery 1974-1975, G. R. Morgan, E H. Barker
Fisheries Report No 28 - The Western Rock Lobster Fishery 1974-1975, G. R. Morgan, E H. Barker
Fisheries Research Reports
The fishery for the western rock lobster Panultrus eygnus is one of the most important single fisheries in Australia and an important export earner for the State. The fishery is governed by a complex set of regulations which have been reviewed by Bowen (1971) and which are designed to limit the total effort to acceptable levels and to enforce a legal minimum size. It is thus important to constantly monitor the state of the fishery both to ensure that the effort is remaining within the accepted limits and that the regulations are adequately performing their function of maintaining reasonably stable …
Inventory Of Wetland Habitat Usig Remote Sensing For The Proposed Oahe Irrigation Unit In Eastern South Dakota, Robert G. Best, Donald G. Moore
Inventory Of Wetland Habitat Usig Remote Sensing For The Proposed Oahe Irrigation Unit In Eastern South Dakota, Robert G. Best, Donald G. Moore
United States Fish and Wildlife Service: Publications
An inventory of wetlands for the area included in the proposed Oahe Irrigation Project was conducted to provide supplemental data for the wildlife mitigation plan. This report including the data summaries follows a report which documented the interpretation techniques as presented by Best, Moore, and Brewster for inventoryinq small, predominantly Type I wetlands in the low-relief terrain of the Lake Dakota Plain. Wetland habitat in over 310,000 acres in the Oahe irrigation district was inventoried. There were 5305 wetlands representing 7530 acres, 589 acres of natural drains, and 1545 acres of stream habitat in the area. The data were stored …
Nesting By Ferruginous Hawks And Other Raptors On High Voltage Powerline Towers, David S. Gilmer, John M. Wiehe
Nesting By Ferruginous Hawks And Other Raptors On High Voltage Powerline Towers, David S. Gilmer, John M. Wiehe
United States Fish and Wildlife Service: Publications
High voltage powerlines form a spider-web pattern across North Dakota as they radiate outward from electric generating sources at Garrison Dam and nearby lignite-fired power plants. In 1976 there were approximately 1100 miles of high voltage powerline in the state, which required approximately 4500 large steel or aluminum towers for support (G. R. Anderson, personal communication). Moreover, officials of power cooperatives and privately-owned utilities anticipate the construction of over 900 additional miles of high voltage lines by 1981. As North Dakota coal resources are developed the powerline network will probably continue to grow.
Our interest in powerlines was stimulated several …
Fisheries Report No 20 - Trawl Caught Fish And Crustaceans From Cockburn Sound, J. W. Penn
Fisheries Report No 20 - Trawl Caught Fish And Crustaceans From Cockburn Sound, J. W. Penn
Fisheries Research Reports
Cockburn Sound is one of the few sheltered embayments near the Perth metropolitan area and as such has been subjected to increasing usage by both the general public and industry. Historically the Sound has been a major commercial fishing area from which much of the fresh fish for the metropolitan area has been caught. More recently, as well as providing a significant commercial catch, a major sport fishery has developed in the area.
The first commercial trawling operations in Cockburn Sound were undertaken in the early part of this century when horses were used to tow small nets on the …
Fisheries Report No 31 - Pecten Scallop Survey On Southern Geographe Bay, September 1976, D. I. Heald
Fisheries Report No 31 - Pecten Scallop Survey On Southern Geographe Bay, September 1976, D. I. Heald
Fisheries Research Reports
Reports of Pecten scallops in Geographe Bay in late 1975 were followed up by a preliminary stock survey in February 1976 using 1.22 m dredges and by a more extensive survey in September 1976 using 1.22 m and 2.25 m scallop dredges and a 0.5 m* Baird grab. Two very limited concentrations of scallops were located adjacent to rough ground. The best dredge catch rates were equivalent to 44 kg per hour per standard haul and the maximum grab catch was equivalent to a density of six scallops per square metre. The extremely rough terrain resulted in considerable damage to …
Fisheries Report No 27 - A Survey Of Recreational Usage Of South Coastal Estuaries Of Western Australia, N. Caputi, R C.J. Lenanton
Fisheries Report No 27 - A Survey Of Recreational Usage Of South Coastal Estuaries Of Western Australia, N. Caputi, R C.J. Lenanton
Fisheries Research Reports
Over recent years, factors such as the State's population increase, a generally higher standard of living which enables people to have more leisure time, and better roads, particularly from the Eastern States of Australia, have all contributed towards an increase in the general recreational usage of the Western Australian south coast estuaries.
To aid proper planning of facilities to cater for an increasing number of visitors in these south coast estuaries, management agencies must be able to quantify the recreational usage in this group of estuaries.
This survey, therefore, attempts to identify and quantify the different recreational pursuits of visitors …
Fisheries Report No 24 - The Status Of The Salt-Water Crocodile In Some River Systems Of The North-West Kimberley, Western Australia, H. Messel, A. A. Burbidge, A. G. Wells, W. J. Green
Fisheries Report No 24 - The Status Of The Salt-Water Crocodile In Some River Systems Of The North-West Kimberley, Western Australia, H. Messel, A. A. Burbidge, A. G. Wells, W. J. Green
Fisheries Research Reports
Counts were made of Salt-water Crocodiles (Crocodylus porosus) in the estuarine portions of four river systems in the northwest Kimberley, Western Australia - the Lawley, Mitchell, Roe-Hunter and Prince Regent. During the ten day survey 463 crocodiles were spotted, including 109 hatchlings. The maximum number of non-hatchling crocodiles present tin the four systems is estimated at 697. Very few large crocodiles were seen.
Populations were particularly small in the Lawley and Mitchell Rivers and the potential for recovery in this area is also small. Prospects for recovery in the Roe-Hunter and Prince Regent were a little better but further surveys …
Fisheries Report No 29 - The Predation Of Pot - Caught Western Rock Lobster (Panulirus Longpipes Cygnus) By Octopus, L M. Joll
Fisheries Research Reports
The losses to the western rock lobster fishery through the predation of pot-caught rock lobsters by octopus were estimated from samples taken on commercial boats in the four seasons 1972/73 - 1975/76. In most seasons approximately 200 000 legal-sized rock lobsters were lost. In the 1975/76 season the estimated financial loss from octopus predation was $392 000. The estimated losses probably represent minimum values. Studies of the biology and behaviour of octopus were carried out to examine the methods of detection, location and entry into rock lobster pots by octopus. The use of octopus traps in rock lobster pots significantly …