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Trophic Comparison Of Two Species Of Needlefish (Belonidae) In The Alvarado Lagoonal System, Veracruz, Mexico, Daniel Arceo-Carranza, Jonathan Franco-Lopez, Gretchen L. Waggy, Rafael Chavez-Lopez
Trophic Comparison Of Two Species Of Needlefish (Belonidae) In The Alvarado Lagoonal System, Veracruz, Mexico, Daniel Arceo-Carranza, Jonathan Franco-Lopez, Gretchen L. Waggy, Rafael Chavez-Lopez
Gulf and Caribbean Research
We compared the diets of Atlantic needlefish, Strongylura marina, and redfin needlefish, Strongylura notata, in the Alvarado lagoonal system, Veracruz, Mexico, and analyzed diet breadth and trophic overlap between the species. All fishes were collected monthly from June 2000 to July 2001 at twelve sampling stations. A total of 74 intestinal tracts from S. marina were analyzed. The diet of S. marina consisted of 25 prey types with fish being the dominate prey. In eighty-nine digestive tracts examined from S. notata, the diet consisted of 29 prey types with the dominant prey including fishes, penaeid shrimp, polychaetes, …
Reproductive Structures And Early Life History Of The Gulf Toadfish, Opsanus Beta, In The Tecolutla Estuary, Veracruz, Mexico, Alfredo Gallardo-Torres, Jose Antonio Martinez-Perez, Brian J. Lezina
Reproductive Structures And Early Life History Of The Gulf Toadfish, Opsanus Beta, In The Tecolutla Estuary, Veracruz, Mexico, Alfredo Gallardo-Torres, Jose Antonio Martinez-Perez, Brian J. Lezina
Gulf and Caribbean Research
Although the Gulf toadfish, Opsanus beta, is an abundant member of the nearshore Gulf of Mexico ichthyofaunal assemblage, little information exists regarding the ecology of the species, especially for southern Gulf of Mexico populations. We added to the existing knowledge of this species by describing the reproductive structures and examining the early life history of this species in the Tecolutla estuary, Mexico. Macro- and microscopic examination of 7 males showed spermatogenesis to be similar to other teleost species except for the occurrence of biflagellate spermatozoa. Histological examination of the male accessory gland showed 3 tissue layers, but their functions …