Fishery biology and demography of the Atlantic sharpnose shark, Rhizoprionodon terraenovae, in the southern Gulf of Mexico

1998 ◽  
Vol 39 (2) ◽  
pp. 183-198 ◽  
Author(s):  
J Fernando Márquez-Farias ◽  
J Leonardo Castillo-Geniz
Keyword(s):  
Gulf Of Mexico ◽  
Fishery Biology ◽  
Rhizoprionodon Terraenovae ◽  
Southern Gulf Of Mexico ◽  
Atlantic Sharpnose Shark

scholarly journals Diet shifts of Rhizoprionodon terraenovae from the southern Gulf of Mexico: possible scenario by temperature changes

2020 ◽  
Vol 48 (3) ◽  
pp. 406-420
Author(s):  
Javier E. Viana-Morayta ◽  
Yassir E. Torres-Rojas ◽  
Jaime Camalich-Carpizo
Keyword(s):  
Body Size ◽  
Gulf Of Mexico ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Trophic Level ◽  
Negative Relationship ◽  
Diet Breadth ◽  
Sea Surface ◽  
Rhizoprionodon Terraenovae ◽  
Southern Gulf Of Mexico

The current study examined the stomach contents of the Atlantic sharpnose shark (Rhizoprionodon terraenovae) in the southern Gulf of Mexico during 2015 to understand the relationship between diet and changes in sea surface temperature (SST). Prey-specific index of relative importance (%PSIRI), diet breadth (Bi), trophic level (TrL), and trophic overlap (PERMANOVA) were calculated between sexes, body size, and climatic seasons (dry, rainy and winter storm). The lowest temperature recorded in the area was during February (23.9°C), and the highest was during August (29.1°C). A total of 124 stomachs were analyzed, with 54.84% containing food. The trophic spectrum was composed of 32 identified prey, with demersal fish (Haemulon plumierii; %PSIRI = 22.82) and pelagic fish (Sardinella aurita; %PSIRI = 12.83) being the most important. According to the diet breadth (Bi = 0.002), Costello's graph, and trophic level (TrL = 4.2), R. terraenovae is a specialist tertiary consumer. PERMANOVA indicated significant trophic differences between sexes (F = 32.22; P < 0.05), body size (F = 13.68; P < 0.05), and among climatic seasons (F = 23.86; P < 0.05). Spearman's correlation indicated a negative relationship between the diversity of prey consumed by R. terraenovae and sea surface temperature (r = -0.75; P < 0.05). Therefore, diet for R. terraenovae is associated with SST, allowing for the development of possible scenarios related to climatic phenomena like climate change.

Changes in biological parameters of Atlantic sharpnose shark Rhizoprionodon terraenovae in the Gulf of Mexico: evidence for density-dependent growth and maturity?

2003 ◽  
Vol 54 (3) ◽  
pp. 227 ◽  
Author(s):  
John K. Carlson ◽  
Ivy E. Baremore
Keyword(s):  
Gulf Of Mexico ◽  
Growth Parameters ◽  
Biological Data ◽  
Biological Parameters ◽  
Compensatory Response ◽  
Density Dependent ◽  
Total Length ◽  
Rhizoprionodon Terraenovae ◽  
Average Size ◽  
Atlantic Sharpnose Shark

Biological parameters of the Atlantic sharpnose shark Rhizoprionodon terraenovae in the northern Gulf of Mexico were re-examined to test for potential changes due to density dependent responses. Biological data from published studies in the Gulf of Mexico collected during the period 1979–1984 were compared with data collected during the period 1998–2001. For combined sexes, the von Bertalanffy growth parameters were L∞ = 110.8 cm total length, K = 0.39 year–1 and to = –0.86 year during 1984 and L∞ = 94.0 cm total length, K = 0.73 year–1 and to = –0.88 year during 1998–2001. Median size for males and females at maturity decreased from approximately 78.3 and 80.2�cm total length (TL), respectively, in 1979–1980 to 72.6 and 75.8 cm TL, respectively, in 1998–2001. Age at maturity for combined sexes also decreased from 2.3 years in 1979–1980 to 1.4 years in 1998–2001. Litter size was similar between periods (5.0 embryos), as was the average size of embryos close to parturition (32 cm TL; 130–150�g). Growth rates using observed mean size-at-age data were higher from 1998–2001 for early ages (0–2.5 years). The observed decrease in maturity and increased growth rate lends support to the hypothesis of a compensatory response, although it could not be fully determined whether the response was due to differences in methodology among studies, anthropogenic influences or natural causes.

High genetic connectivity in the Atlantic sharpnose shark, Rhizoprionodon terraenovae, from the southeast Gulf of Mexico inferred from AFLP fingerprinting

2013 ◽  
Vol 147 ◽  
pp. 338-343 ◽  
Author(s):  
Pablo de Jesús Suárez-Moo ◽  
Axayácatl Rocha-Olivares ◽  
Omar Zapata-Pérez ◽  
Adriana Quiroz-Moreno ◽  
Lorenzo Felipe Sánchez-Teyer
Keyword(s):  
Gulf Of Mexico ◽  
Genetic Connectivity ◽  
Aflp Fingerprinting ◽  
Rhizoprionodon Terraenovae ◽  
Atlantic Sharpnose Shark

Fishery indicators during a predictable aggregation of Atlantic sharpnose sharks Rhizoprionodon terraenovae in the southern Gulf of Mexico: An alternative to assess a heterogeneous data‐poor fishery

2019 ◽  
Vol 26 (4) ◽  
pp. 354-364 ◽  
Author(s):  
Esteban Bada‐Sánchez ◽  
Juan Carlos Pérez‐Jiménez ◽  
Luis Enrique Martínez‐Cruz ◽  
Iván Méndez‐Loeza ◽  
Eloy Sosa‐Cordero
Keyword(s):  
Gulf Of Mexico ◽  
Heterogeneous Data ◽  
Rhizoprionodon Terraenovae ◽  
Southern Gulf Of Mexico

scholarly journals Critical In-Water Habitats for Post-Nesting Sea Turtles from the Southern Gulf of Mexico

2021 ◽  
Vol 9 (8) ◽  
pp. 793
Author(s):  
Abigail Uribe-Martínez ◽  
María de los Angeles Liceaga-Correa ◽  
Eduardo Cuevas
Keyword(s):  
Gulf Of Mexico ◽  
Marine Ecosystem ◽  
Satellite Telemetry ◽  
Marine Turtle ◽  
Home Ranges ◽  
The Bahamas ◽  
Turtle Species ◽  
Southern Gulf Of Mexico ◽  
Large Marine Ecosystem ◽  
Physical Features

Marine turtles are globally endangered species that spend more than 95% of their life cycle in in-water habitats. Nevertheless, most of the conservation, recovery and research efforts have targeted the on-land habitats, due to their easier access, where adult females lay their eggs. Targeting the large knowledge gaps on the in-water critical habitats of turtles, particularly in the Large Marine Ecosystem Gulf of Mexico, is crucial for their conservation and recovery in the long term. We used satellite telemetry to track 85 nesting females from their beaches after they nested to identify their feeding and residency habitats, their migratory corridors and to describe the context for those areas. We delimited major migratory corridors in the southern Gulf of Mexico and West Caribbean and described physical features of internesting and feeding home ranges located mainly around the Yucatan Peninsula and Veracruz, Mexico. We also contributed by describing general aggregation and movement patterns for the four marine turtle species in the Atlantic, expanding the knowledge of the studied species. Several tracked individuals emigrated from the Gulf of Mexico to as far as Nicaragua, Honduras, and the Bahamas. This information is critical for identifying gaps in marine protection and for deciphering the spatial connectivity in large ocean basins, and it provides an opportunity to assess potential impacts on marine turtle populations and their habitats.

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