Lifetime-scale ontogenetic movement and diets of red grouper inferred using a combination of instantaneous and archival methods

2022 ◽  
Author(s):  
Julie L. Vecchio ◽  
Ernst B. Peebles
Keyword(s):  
Red Grouper

Isotopic characterization of lifetime movement by two demersal fishes from the northeastern Gulf of Mexico

2021 ◽  
Vol 657 ◽  
pp. 161-172
Author(s):  
JL Vecchio ◽  
JL Ostroff ◽  
EB Peebles
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Life Histories ◽  
Linear Mixed Model ◽  
Trophic Position ◽  
Eye Lens ◽  
Outer Continental Shelf ◽  
Red Grouper ◽  
Lens Diameter ◽  
Isotopic Characterization

An understanding of lifetime trophic changes and ontogenetic habitat shifts is essential to the preservation of marine fish species. We used carbon and nitrogen stable isotope values (δ13C and δ15N) recorded within the laminar structure of fish eye lenses, reflecting both diet and location over time, to compare the lifetime trends of 2 demersal mesopredators. Tilefish Lopholatilus chamaeleonticeps inhabit burrows on the outer continental shelf, which results in exceptional site fidelity. Red grouper Epinephelus morio are spawned on the middle to outer continental shelf, move to the inner shelf for the juvenile period, and return offshore upon sexual maturity. Both species inhabit the eastern Gulf of Mexico, a region with a distinctive offshore-inshore gradient in background δ13C values. Within individual tilefish (n = 36), sequences of δ13C values and δ15N values had strong, positive correlations with eye-lens diameter, and strong correlations between the 2 isotopes (mean Spearman r = 0.86), reflecting an increase in trophic position with growth and little lifetime movement. In red grouper (n = 30), δ15N values positively correlated with eye-lens diameter, but correlations between δ15N and δ13C were weak (mean Spearman r = 0.29), suggesting cross-shelf ontogenetic movements. Linear mixed model results indicated strong relationships between δ15N and δ13C values in tilefish eye lenses but no convergence in the red grouper model. Collectively, these results are consistent with previously established differences in the life histories of the 2 species, demonstrating the potential utility of eye-lens isotope records, particularly for investigating the life histories of lesser-known species.

High predatory efficiency and abundance drive expected ecological impacts of a marine invasive fish

2020 ◽  
Vol 637 ◽  
pp. 195-208 ◽  
Author(s):  
EM DeRoy ◽  
R Scott ◽  
NE Hussey ◽  
HJ MacIsaac
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Ecological Impact ◽  
Marine Species ◽  
Ecological Impacts ◽  
Negative Effects ◽  
Marine Predator ◽  
Eastern Gulf Of Mexico ◽  
Red Grouper ◽  
Per Capita

The ecological impacts of invasive species are highly variable and mediated by many factors, including both habitat and population abundance. Lionfish Pterois volitans are an invasive marine species which have high reported detrimental effects on prey populations, but whose effects relative to native predators are currently unknown for the recently colonized eastern Gulf of Mexico. We used functional response (FR) methodology to assess the ecological impact of lionfish relative to 2 functionally similar native species (red grouper Epinephelus morio and graysby grouper Cephalopholis cruentata) foraging in a heterogeneous environment. We then combined the per capita impact of each species with their field abundance to obtain a Relative Impact Potential (RIP). RIP assesses the broader ecological impact of invasive relative to native predators, the magnitude of which predicts community-level negative effects of invasive species. Lionfish FR and overall consumption rate was intermediate to that of red grouper (higher) and graysby grouper (lower). However, lionfish had the highest capture efficiency of all species, which was invariant of habitat. Much higher field abundance of lionfish resulted in high RIPs relative to both grouper species, demonstrating that the ecological impact of lionfish in this region will be driven mainly by high abundance and high predator efficiency rather than per capita effect. Our comparative study is the first empirical assessment of lionfish per capita impact and RIP in this region and is one of few such studies to quantify the FR of a marine predator.

Paracapillaria epinepheli n. sp. (Nematoda: Capillariidae) from the red grouper Epinephelus morio (Pisces) from Mexico

1996 ◽  
Vol 33 (2) ◽  
pp. 149-153 ◽  
Author(s):  
František Moravec ◽  
Edgar Mendoza-Franco ◽  
Joaquin Vargas-Vázquez
Keyword(s):  
Epinephelus Morio ◽  
Red Grouper

Red Grouper Reproduction in the Southern Gulf of Mexico

1999 ◽  
Vol 128 (3) ◽  
pp. 385-402 ◽  
Author(s):  
Thierry Brulé ◽  
Christian Déniel ◽  
Teresa Colás-Marrufo ◽  
Manuel Sánchez-Crespo
Keyword(s):  
Gulf Of Mexico ◽  
Red Grouper ◽  
Southern Gulf Of Mexico

Red grouper nervous necrosis virus (RGNNV) induces autophagy to promote viral replication

2020 ◽  
Vol 98 ◽  
pp. 908-916 ◽  
Author(s):  
Chen Li ◽  
Jiaxin Liu ◽  
Xin Zhang ◽  
Yepin Yu ◽  
Xiaohong Huang ◽  
...  
Keyword(s):  
Viral Replication ◽  
Nervous Necrosis Virus ◽  
Necrosis Virus ◽  
Red Grouper

scholarly journals Morphology and morphometric relationships for sagitta otoliths in Lutjanus argentiventris (Pisces: Lutjanidae) and Hyporthodus acanthistius (Pisces: Serranidae) from the Colombian Pacific Ocean

2019 ◽  
Vol 24 (2) ◽  
pp. 337-361 ◽  
Author(s):  
Vladimir Puentes-Granada ◽  
Paola Rojas ◽  
Giovanni Pavolini ◽  
Carlos Fernando Gutierrez ◽  
Angel Andres Villa
Keyword(s):  
Regression Models ◽  
Fish Length ◽  
Otolith Growth ◽  
Growth Rings ◽  
Fish Weight ◽  
Red Grouper ◽  
Distal Surface ◽  
Total Fish ◽  
Yellow Snapper ◽  
Colombian Pacific

Fish earstones, or otoliths, are  inner ear structures that can be studied to determine a fish’s age and are a source of taxonomically informative data. In the present work, sagitta otoliths of the Yellowtail snapper (Lutjanus argentiventris) and the Red grouper (Hyporthodus acanthistius) were collected in the Colombian Pacific, and their key morphological features were studied. Otoliths of the Yellow tail snapper were distinctly concave by their distal surface, revealing features shared with species of its genus (Lutjanus). Red grouper otoliths were elliptic and compressed laterally by their proximal surface, bearing similarities to those of other Serranid species. Morphometric relationships between otolith size weight and whole fish size and weight were also studied. In Red groupers significant statistical morphometric relationships between otolith and body features were found via power regression models; successfully relating otolith length with total fish length, otolith weight with total fish length, otolith length with total fish weight, and otolith weight with total fish weight. No significant morphometric relationships were found for the Yellow snapper data. In both fish species, otolith transversal sections proved best to identify its internal features and to distinguish otolith growth rings, as a method for determining the specimen’s age.

Spatial and temporal repeatability in parasite community structure of tropical fish hosts

Parasitology ◽  
2003 ◽  
Vol 127 (4) ◽  
pp. 387-398 ◽  
Author(s):  
V. M. VIDAL-MARTÍNEZ ◽  
R. POULIN
Keyword(s):  
Community Structure ◽  
Marine Fish ◽  
Fish Species ◽  
Cichlid Fish ◽  
Positive Association ◽  
Parasite Community ◽  
Tropical Fish ◽  
Freshwater Species ◽  
Interspecific Associations ◽  
Red Grouper

An assessment is made of the repeatability of parasite community structure in space for a marine fish, and in space and time for a freshwater fish from south-eastern Mexico. The marine fish species was the red grouper,Epinephelus morio(collected from 9 localities), and the freshwater species was the cichlid,Cichlasoma urophthalmus(collected from 6 localities: including monthly at 2 localities for 1 year, and bimonthly at 1 locality in 1990 and 1999). Pairwise interspecific associations and analyses of nested patterns in the distributions of parasite species among hosts were used in both fish species, with comparisons over time made only with the cichlid. Positive interspecific associations, and nested patterns were noted in some localities for both fish species, and/or at some sampling times for the cichlid fish. However, non-random patterns in the structure of parasite communities in these 2 host species only were observed sporadically. When present, nestedness in both fish species was apparently linked with a positive association between total infection intensities and fish size. Additionally, adjacent localities were more likely to display similar parasite community structure than distant ones. This preliminary result suggests that distance between localities is an important determinant of predictability in parasite community structure.

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