Zoology Commons^™

Investigation Of Protective Effects Of Lithium Borate On Spermatogenesis And Testes Histopathology Against Cadmium-Induced Acute Toxicity In Rats, Serkan Yildirim, Fati̇h Çağlar Çeli̇kezen, Saadet Belhan, Gökhan Oto, Gi̇zem Eser, Emi̇n Şengül, Dursunali̇ Çinar

Turkish Journal of Zoology

In this study, protective effects of lithium borate (LTB) on spermatogenesis as well as histopathological and immunohistochemical findings of testes in experimentally induced acute Cadmium (Cd) toxicity in rats were determined. Twenty-eight male Wistar albino rats, were used, weighing 200-220 g. Rats were randomly divided into 4 groups: Control, Cd, LTB, and LTB + Cd. Rats were anesthetized with ketamine at the end of the sixth day, blood was taken from their hearts, and the rats were decapitated. Typically, the control and LTB groups exhibited similar values. Compared with those observed for the control group, the sperm morphology (i.e. abnormal …

Evaluation Of Nickel-Induced Brain Injuries In Rats Via Oxidative Stress And Apoptosis:Attenuating Effects Of Hyperoside, Gülşah Yildiz Deni̇z, Serdar Altun

Turkish Journal of Zoology

The purpose of this study was to examine whether the administration of nickel (Ni) was associated with cell apoptosis and also to evaluate whether post acute oral exposure to hyperoside would cause histopathologic alterations in rats. Four groups of male Sprague- Dawley rats (n = 7) used in this study were as follows: a control group and groups treated with Ni (as NiCI$_{2}$, 13 mg/kg), hyperoside (Hyp) (50 mg/kg), and Ni + Hyp. Routine histopathological examination methods such as hematoxylin and eosin (H&E), periodic acid-Schiff (PAS), and Congo red staining for amyloid deposits were applied at the end of the …

The Employment Of A Conformal Polydopamine Thin Layer Reduces The Cytotoxicity Ofsilver Nanoparticles, Asli Yilmaz

Turkish Journal of Zoology

Silver nanoparticles (AgNPs) with their unique properties represent great promise in biological applications. However, the high toxicity of AgNPs still remains a major bottleneck and hinders their basic usage. In the present study, to improve the cytotoxicity of AgNPs, a thin layer of polydopamine (PDOP) was proposed as shell material. For this, the as-prepared citrate-stabilized AgNPs were dispersed in dopamine solution under alkaline conditions. The thickness of the PDOP layer could be manipulated simply by tuning the polymerization time. It was indicated that all NP systems (PDOP, AgNP, and AgNP@PDOP) were efficiently synthesized in the desired size and morphology. Cytotoxicity …

Investigations Of The Nervous System Biomarkers In The Brain And Muscle Of Freshwater Fish (Oreochromis Niloticus) Following Accumulation Of Nanoparticles In The Tissues, Esi̇n Gülnaz Canli, Mustafa Canli

Turkish Journal of Zoology

The use of nanoparticles (NPs) has increased in recent years and consequently they are being released into the environment. The final destination of most NPs is the aquatic environment due to washing up by rain waters. Fish (n = 120) were exposed to different concentrations (0, 1, 5, and 25 mg/L) of aluminum-oxide (Al$_{2}$O$_{3}$), copper-oxide (CuO), and titanium-dioxide (TiO$_{2}$) NPs for 14 days and 14 days of depuration period (no NP in water). Following NP exposures, activities of Na,K-ATPase, Mg-ATPase, Ca-ATPase, and acetylcholinesterase (AChE) in the brain and muscle were measured. AChE activity in the brain and muscle decreased significantly …

The Effects Of Feeding Obese Rats With Bee Bread On Leptin And Ghrelin Expression, Züleyha Doğanyi̇ği̇t, Bi̇rkan Yakan, Meltem Soylu, Emi̇n Kaymak, Si̇bel Si̇li̇ci̇

Turkish Journal of Zoology

Obesity is an important public health problem and a risk factor for many chronic diseases, and its prevalence is increasing rapidly. In recent years there has been interest in the impact of nutrients on obesity and this has been addressed as a research topic. Bee bread is a bee product that has recently attracted attention with its macro- and micronutrients and the enzymes and biocomponents it contains. Although there are many studies on the biological properties and effects of bee bread, its effect on obesity with leptin and ghrelin has not been investigated. In this study, 40 Sprague-Dawley adult female …

Nonpharmacological Treatment Options For Alzheimer's Disease: From Animal Testing Toclinical Studies, Hasan Türkez, Mehmet Enes Arslan, Antonio Di Stefano, Ivana Cacciatore, Adi̇l Mardi̇noğlu

Turkish Journal of Zoology

Despite extensive pharmacological approaches, there is no curative therapy for Alzheimer?s disease (AD) or other types of dementias. While current pharmacological options alleviate some symptoms of AD, they can lead to various adverse effects. Hence, nonpharmacological treatment options for AD are often considered with the assumption that they are safe, effective, and economic in managing patients. Furthermore, studies on animal models have suggested that environmental exposures like diet, music, or rewardrelated actions can stimulate neuronal regeneration and differentiation without using any pharmacological factors. The aim of this review is to provide a summary of nonpharmacological treatment options for the management …

Dna Barcoding Of Black Cherry Aphid Myzus Cerasi (Fabricus, 1775)(Hemiptera: Aphididae) Populations Collected From Prunus Avium And Prunus Cerasus, Burcu İnal, İrfan Kandemi̇r

Turkish Journal of Zoology

Sequences of the mitochondrial cytochrome oxidase I (COI) gene of one Greek and 25 Turkish Myzus cerasi (Fabricus) (Hemiptera: Aphididae) populations collected from Prunus avium and Prunus cerasus were analyzed. The partial coding region of COI studied is 605 bp for all the populations, from which 565 nucleotides were conserved, 40 were variable, 37 were singleton, and 3 were parsimony-informative. Four haplotypes were identified based on nucleotide substitutions and the mean of intraspecific divergence was calculated to be 0.3%. Phylogenetic trees were constructed using maximum likelihood, neighbor joining, and minimum evolution. Myzus persicae (Sulzer) and Myzus borealis Ossiannilson were included …

Description Of Three New Species Of Geostiba Thomson, 1858(Coleoptera: Staphylinidae, Aleocharinae) From Central Western Anatolia, Semi̇h Örgel, Si̇nan Anlaş

Turkish Journal of Zoology

As result of faunistic studies from Afyonkarahisar province in central western Anatolia, three new species of the subgenus Tropogastrosipalia Scheerpeltz belonging to the genus Geostiba Thomson are described and illustrated: Geostiba ahirensis sp. nov. (Ahır Dağları), G. sandiklica sp. nov. (Sandıklı Dağı), and G. karakusensis sp. nov. (Karakuş Dağları). A key is presented for distinguishing the new species from related congeners and a map shows the distributions of seven species.

Fish Larvae Assemblages Of Gökçeada Island, North Aegean Sea: Effect Of Weekly Samplinginterval On Their Incidences, İsmai̇l Burak Daban, Ali̇ İşmen

Turkish Journal of Zoology

The species composition and temporal variations of fish larvae in shallow waters (

Age And Growth In Two Populations Of Danford?S Lizard, Anatololacerta Danfordi(Günther, 1876), From The Eastern Mediterranean, Nuretti̇n Beşer, Çeti̇n Ilgaz, Yusuf Kumlutaş, Kami̇l Candan, Özgür Güçlü, Nazan Üzüm

Turkish Journal of Zoology

The age and growth in two breeding populations of A. danfordi, inhabiting altitudes ranging from 678 m a.s.l. to 1200 m a.s.l. in Turkey, were investigated. The age differences between sexes were not statistically significant in either population. The mean age was calculated as 8.73 ± 2.12 and 8.33 ± 1.8 years in Kozan and 7.25 ± 1.58 and 5.78 ± 1.64 years in Saimbeyli for males and females, respectively. The age distributions of males did not statistically differ between populations, but females in Kozan were significantly older than those in Saimbeyli. The mean snout-vent length (SVL) difference between sexes …

Camera Trapping Of Medium And Large-Sized Mammals In Western Black Sea Deciduousforests In Turkey, Mühsi̇n Çoğal, Mustafa Sözen

Turkish Journal of Zoology

Camera trapping is one of the most effective methods for mammal inventories in most habitats and conditions. This study is based on the mammal records of a camera trap study in Northwest Anatolia. The study area was about 3500 km2, and the study was carried out between May 2014 and May 2015. A total of 62 sites were surveyed, resulting in 3653 records of 16 mammal species (Sciurus anomalus, Erinaceus concolor, Felis silvestris, Canis lupus, Canis aureus, Vulpes vulpes, Ursus arctos, Meles meles, Martes foina, Martes martes, Mustela nivalis, Lutra lutra, Sus scrofa, Capreolus capreolus, Lepus europaeus, Cervus elaphus) in …

Mir-331 Negatively Regulates Thyroglobulin Secretion Via Erp29, Kyungmin Moon, Eun Ryeong Lee, Junghae Kim, Kisang Kwon, Oyu Kwon

Turkish Journal of Zoology

We investigated the effect of endoplasmic reticulum (ER) protein 29 (ERp29) on thyroglobulin (Tg) secretion and its negative regulation by microRNAs (miRNAs). ERp29 overexpression promoted Tg secretion from thyrocytes of PCCL3 cells via activation of ER stress sensors, including activation of transcription factor 6 fragmentation, XBP1 mRNA splicing by inositol-requiring enzyme 1, and phosphorylation of eukaryotic initiation factor 2 alpha as downstream actions of RNA-dependent protein kinase-like ER kinase. Thyroid hormone receptor beta is a target gene of mir-331, one of the most abundant miRNAs observed in ERp29-overexpressing cells. mir-331 negatively regulated Tg expression and secretion by ~70% compared with …

The First Record Of Raccoon Dog (Nyctereutes Procyonoides) In Turkey, Morteza Naderi, Emrah Çoban, Josip Kusak, Mübeccel Çi̇sel Kemahli Ayteki̇n, Mark Chynoweth, İsmai̇l Kayahan Ağirkaya, Nesli̇han Güven, Ayşegül Çoban, Cagan H. Sekercioglu

Turkish Journal of Zoology

The raccoon dog (Nyctereutes procyonoides) was recorded for the first time in Turkey on May 10, 2019, and June 5, 2019, in the same location after 4668 nights of camera trapping in the forests of the Sarıkamış region and Allahuekber Mountains in eastern Turkey. It was recorded in a Scots pine (Pinus sylvestris) forest at 2340 m above sea level with extensive snow cover. Given that the nearest known population is in the forests of Georgia approximately 105 km away, there may already be a viable population in Turkey. As an omnivorous species with a high adaptive ability and high …

C-Heterochromatin And Nucleolus Organizer Region Distribution Ofmyotis Emarginatus (Chiroptera: Vespertilionidae) From Turkey, İrfan Albayrak, Tuğba Sariçam, Ati̇lla Arslan

Turkish Journal of Zoology

In this study, the banded karyotypes (C- and Ag-nucleolus organizer regions (NORs)) of Myotis emarginatus in Turkey were determined for the first time. The karyotype contained 44 chromosomes, the number of chromosomal arms (NF) was 54, and the number of autosomal arms (NFa) was 50. Slight C-heterochromatic blocks were observed in the centromeric regions of some autosome pairs, whereas the sex chromosomes were euchromatic. The Ag-NORs were detected in the short arms of a large and a medium-sized acrocentric autosome. The distribution of C-heterochromatin regions in Turkish populations of M. emarginatus is similar to those reported in some other Myotis …

Vertebrate Insulin Alters The Expression Profile Of Steroid Hormone Ecdysone Receptorcomplex Components And Autophagy-Related Genes In The Pupal Fat Body Of The Silkworm, Bombyx Mori, Sedat Yelkovan, Nesri̇n Ebru Göncü

Turkish Journal of Zoology

Various studies have shown that the insulin-like peptides present in insects and investigation of their possible effects on insect physiology have significance for clarifying the evolutionary developmental period of insulin. The insect fat body is an organ analog to vertebrate adipose tissue and liver. In insects which do not have feeding activity during pupal and adult stages such as Bombyx mori, substances and energy required for continuation of life and development of tissues and organs are provided by the fat body via the autophagy process. In this study, we aimed to analyze the action of mammalian insulin in Bombyx pupae …

The Orientation Of Earthworms Is Influenced By Magnetic Fields, Fehi̇me Sevi̇l Yalçin, Şükran Yalçin Özdi̇lek, Ruki̇ye Altaş

Turkish Journal of Zoology

Earth has a natural magnetic field that many animals use for orientation and navigation. With the development of technology, these natural systems have been exposed to high levels of man-made electromagnetism from the heavy usage of electric devices. This study aims to understand the possible effects of artificial magnetic fields on the behavioral responses of the earthworm, which is used in this study as a model organism in laboratory conditions. The 3 experimental groups, each composed of 20 earthworms, were exposed to 190?520 ?T magnetic fields using a 1.5 V current for 1-h durations in a wire-wrapped vivarium. The experimental …

First Record Of Ahaetulla Mycterizans (Linnaeus, 1758) (Serpentes: Colubridae) From The Lesser Sunda Region, Indonesia, Based On Molecular And Morphological Identification, Lilin Ika Nur Indahsari, Fatchiyah Fatchiyah, Eric Nelson Smith, Nia Kurniawan

Turkish Journal of Zoology

Previous studies on the distribution of the Ahaetulla snake across Indonesia only focused on morphological characters without any molecular data. This study was aimed at analyzing phylogenetic relationships among the genus Ahaetulla in Indonesia based on partial mitochondrial DNA sequences of 16 specimens collected from the Sundaland and Lesser Sunda regions. The 12S-rDNA gene was PCR-amplified and sequenced to analyze phylogenetic relationships and to estimate the divergence time between the 2 Ahaetulla populations of the Sundaland and Lesser Sunda regions. Morphological characters of 3 Ahaetulla specimens from Lesser Sunda and Sundaland have also been analyzed to confirm the results based …

A Comparative Evaluation Of Hematological And Biochemical Parameters Between Theitalian Mullet Mugil Cephalus (Linnaeus 1758) And The Turkish Mullet Chelon Auratus (Risso 1810), Francesco Fazio, Concetta Saoca, Ümi̇t Acar, Ri̇fat Tezel, Murat Çeli̇k, Sevdan Yilmaz, Osman Sabri̇ Kesbi̇ç, Ferhat Yalgin, Murat Yi̇ği̇t

Turkish Journal of Zoology

This study aimed to carry out a comparative evaluation of the hematological profile (erythrocyte count, hemoglobin concentration, hematocrit, and Wintrobe index parameters such as mean corpuscular volume, mean corpuscular hemoglobin, and mean corpuscular hemoglobin concentration), in addition to certain biochemical parameters (aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, lactate dehydrogenase, serum total protein, albumin, glucose, total cholesterol, and triglycerides), in the Italian mullet Mugil cephalus (Linnaeus 1758) and the Turkish mullet Chelon auratus (Risso 1810). Accordingly, two groups of fish were used in this study: 30 flathead grey mullets, M. cephalus, caught in Lake Faro, Italy, and 30 golden grey mullets, …

The Partitioning Of Temporal Movement Patterns Of Breeding Red-Crowned Crane(Grus Japonensis) Induced By Temperature, Minghao Gong, Zhongyan Gao, Shiliang Pang, Qiang Dai, Xu Pan, Wanyu Wen, Huixin Li, Fawen Qian, Wenfeng Wang

Turkish Journal of Zoology

Patterns of movement through time are important components of animal behavior and key to understanding animal ecology. Due to methodological challenges, including tracing and analyzing movements and their changes, they are seldom studied to identify both seasonal patterns and their driving forces. Using seven GPS-collared red-crowned cranes (Grus japonensis, RCCs), we recorded their moving distances and concurrent climatic data to analyze the relative importance of these factors in RCC movements. Temperature was identified as the most important of these climatic variables in RCC movements. Based on temperature dependence and researcher expertise, we determined RCC temporal movement patterns as mating, brooding, …

A Study Of Genetic Diversity Among Different Population Of Orthochirus Sp. Based On Cytochrome C Oxidase Subunit I And 16srrna Sequencing, Hedieh Jafari, Fatemeh Salabi, Alireza Forouzan

Turkish Journal of Zoology

Orthochirus sp. (Family: Buthidae) is widespread throughout the world. There are 17 species, 7 of which have been reported in Khuzestan Province of Iran, including the most diverse species related to the scorpion. In the present study, specimens of O. iranus, O. farzanpay, O. zagrosensis, and O. stockwelli were collected from different areas in this province. Phylogenetic analysis was conducted through duplicating and sequencing the cytochrome c oxidase subunit 1 (COXI) and 16SrRNA genes and comparing their genetic diversity. Orthochirus iranus had the highest genetic distance from O. stockwelli, while the lowest genetic distance was observed between O. farzanpay and …

First Contribution On Distribution, Abundance, And Species Richness Of Blowfly Species (Diptera) Of Isparta Province With Five New Records For The Turkish Fauna, Ozan Demi̇rözer, Gamze Pekbey, Rüstem Hayat, Azi̇me Herdoğan, Jelena Acanski, Marija Milicic, Asi̇ye Uzun

Turkish Journal of Zoology

Despite the increasing importance of species richness of blowfly fauna and their environmental, medical, and agricultural importance in the world they are poorly studied in Turkey. This study was carried out in 2014 and 2015 to determine the distribution, abundance, and species richness of blowfly species in Isparta Province of Turkey. A total of 15 species (10 from Calliphoridae, 4 from Polleniidae, and 1 from Rhiniidae) were identified from 13 different localities. The adult specimens were obtained from areas of organic and decayed organic matters, waste and dumpsite, surrounding waste water deposits, and flowering plants. While all the species were …

Ungulate Activity: Effects Of Season, Hunting Pressure, And Plant Type, Alex Capone Lopez

2020 Symposium Posters

Quaking Aspen (Populus tremulodies) is considered priority habitat because it supports diverse understory flora and provides critical nesting and foraging habitat for wildlife. Aspen populations in western North America have declined due to fire suppression and browsing. Turnbull National Wildlife Refuge in eastern Washington addressed declining aspen with prescribed burns. However, aspen growth stimulated by burning was offset by browsing, especially by Elk (Cervus elaphus). Increasing elk numbers prompted initiation of a limited hunt to cull and disperse elk off refuge. To address the impact of these management strategies, we used remote video cameras to monitor …

Identification Of Causes Of Death Of Baikal Seal (Pusa Sibirica Gmelin, 1788), Nina Ryadinskaya, Ivan Meltsov, Maria Tabakova, Inna Anikienko, Svetlana Sayvanova, Alena Molkova, Olga Ilyina, Tatyana Pomoinitskaya

Turkish Journal of Zoology

The Baikal seal is the only endemic mammal of Lake Baikal. In late October 2017, 132 dead Baikal seals were found on the shore of the lake. To identify causes of death, postmortem necropsy, virological, chemical toxicological, microbiological, and parasitological studies were carried out. Several hypotheses for explaining the causes of the deaths were put forward. The most probable causes are heart failure and asphyxia due to echo sounders (sonar). The causes were confirmed by the results of histological examination of the hearts and lungs of a large number of dead seals found on the southern shore of Lake Baikal …

A Literature Review Of Horn And Horn-Like Structures In Vertebrates To Correlate Placement To Function, Behavior, And Niche., J T. Cottingham

Biology Papers and Presentations

In this paper, the true horns of bovids are compared to the many horn-like structures found throughout the animal kingdom. Literary sources were reviewed for a variety of horn-like structures. The review was limited to extinct and extant terrestrial vertebrates. 3D models of these organisms' skulls and “horns” were created or acquired and 3D printed at the same scale to illustrate their differences and similarities and to analysis of their comparative size easier between large and small genera.

Possible Implications Of Weather Variation On Reproductive Phenology Of Europeancommon Toad In Southeastern Europe, Bogdan Jovanovic, Ethan J. Kessler, Marija Ilic, Jelena Corovic, Natasa Tomasevic-Kolarov, Christopher A. Phillips, Jelka Crnobrnja Isailovic

Turkish Journal of Zoology

We tracked yearly variation in breeding phenology in relation to weather parameters in a common European toad population from the southeastern part of its range. Phenological data were collected from 2001 to 2003 and from 2011 to 2017 and compared to open-access daily weather data from a nearby weather station. Data analysis revealed no significant effect of weather on initiation of breeding and a negative relationship between mean daily humidity and mean cloud cover on the duration of breeding season (P = 0.03). Further analysis showed a decreasing trend in breeding season humidity in the past 70 years. Our results …

Genetic Structure And Population Dynamics Of The Silver Pheasant(Lophura Nycthemera) In Southern China, Chaoying Zhu, Wenjing Lu, Guanglong Sun, Jiang Chen, Zhen Zhang, Liangjie Yu, Peng Chen, Yuqing Han, Zhifeng Xu, Junpeng Bai, Dongqin Zhao, Luzhang Ruan

Turkish Journal of Zoology

In southern China, the silver pheasant (Lophura nycthemera) is a widespread species due to complex topography and sufficient habitats and food resources. We investigated the microsatellite and mitochondrial DNA control region sequence of 115 individuals from 7 locations in China to study population dynamics of the silver pheasant during the Pleistocene. The neutrality test and mismatch distribution analyses showed that population expansion began in the interglacial period (76,053 years ago), and the latest common ancestor appeared approximately 970,300 years ago. Most populations exhibited a high level of genetic diversity as well as gene flow. Results of phylogenetic trees and network …

Taxonomic Investigation Of The Genus Ablepharus (Sauria; Scincidae) With Molecular Andmorphological Methods In Anatolian Populations, Emi̇n Bozkurt, Kurtuluş Olgun

Turkish Journal of Zoology

Ablepharus Lichtenstein, 1823, which includes ten species, is distributed in eastern Europe and Asia. Four species are recorded in Turkey: A. kitaibelii, A. chernovi, A. bivittatus, and A. budaki. After molecular and morphological studies in Anatolia, the phylogenetic relationship of the genus is still very complicated. Here, we investigate the taxonomic status of Ablepharus in Anatolia using morphological and molecular methods. The genetic structure of Ablepharus populations in Anatolia was analyzed using both the nuclear (CMOS) and mitochondrial (cyt b and COI) gene regions. The maximum likelihood and Bayesian inference methods were applied for phylogenetic tree reconstruction, together with calculation …

Length-Weight Relationships Of Invasive Mosquitofish(Gambusia Holbrooki Girard, 1859) In 23 River Basins Of Turkey, Irmak Kurtul, Hasan Musa Sari

Turkish Journal of Zoology

Gambusia holbrooki Girard, 1859 has established very strong populations in freshwater resources in Turkey after being introduced into Amik Lake (Hatay/Antakya) at the beginning of the 1920s. In this study, it was aimed to determine the female:male ratios and length-weight relationships of G. holbrooki populations in Turkey, which are considered as a threat, especially for endemic species. G. holbrooki specimen were sampled at total of 66 locations, including 39 lentic and 27 lotic locations, between 2016 and 2017. The female:male ratio was 1:0.39 for all of the investigated localities. Length-weight relationships were investigated at 44 sampling locations for the females …

Gulls As Sources Of Environmental Contamination By Colistin-Resistant Bacteria, Alan B. Franklin, Andrew M. Ramey, Kevin T. Bentler, Nicole L. Barrett, Loredana M. Mccurdy, Christina A. Ahlstrom, Jonas Bonnedahl, Susan A. Shriner, Jeffrey C. Chandler

United States Department of Agriculture Wildlife Services: Staff Publications

In 2015, the mcr-1 gene was discovered in Escherichia coli in domestic swine in China that conferred resistance to colistin, an antibiotic of last resort used in treating multi-drug resistant bacterial infections in humans. Since then, mcr-1 was found in other human and animal populations, including wild gulls. Because gulls could disseminate the mcr-1 gene, we conducted an experiment to assess whether gulls are readily colonized with mcr-1 positive E. coli, their shedding patterns, transmission among conspecifics, and environmental deposition. Shedding of mcr-1 E. coli by small gull flocks followed a lognormal curve and gulls shed one strain >101 …

Piscivorous Bird Use Of Aquaculture And Natural Water Bodies In Mississippi, Paul C. Burr, Jimmy I. Avery, Garrett M. Street, Bronson K. Strickland, Brian S. Dorr

United States Department of Agriculture Wildlife Services: Staff Publications

Double crested cormorants (Phalacrocorax auritus) and great egrets (Ardea alba) have an extensive history of human wildlife conflict with the aquaculture industry of western Mississippi, USA, due to

their depredation of cultured catfish (Ictalurus spp.). Although aquaculture is abundant, western Mississippi also contains naturally occurring water bodies that offer alternative forage opportunities to these species. How cormorants or egrets distribute themselves among these 2 foraging options is unknown, but it has been generally assumed each species uses aquaculture disproportionately more because of the high density of available prey. To test this assumption, we surveyed these …