Age and Growth of the Sandbar Shark (Carcharhinus plumbeus) from the Northern Gulf of Mexico and the Western North Atlantic Ocean

Hale, Loraine F.; Baremore, Ivy E.

doi:10.18785/goms.3101.03

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…Additional samples were also collected from a fishery-independent gill-net survey in order to obtain juvenile Blacktip Sharks not captured by commercial vessels (Figure 1). A full description of the gear and fishing methods can be found in Hale and Baremore (2010).…”

Section: Methodsmentioning

confidence: 99%

Reproduction of the Blacktip Shark in the Gulf of Mexico

Baremore

Passerotti

2013

Mar Coast Fish

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Reproductive and age data were collected for Blacktip Sharks Carcharhinus limbatus in the Gulf of Mexico from fishery‐dependent and ‐independent sources from 2006 to 2011 for stock assessment. A total of 757 Blacktip Sharks were sampled for reproductive analysis (399 females, 358 males), of which 741 were aged. Additional length and age data from a previous age and growth study on Blacktip Sharks in the Gulf of Mexico (207 females, 161 males) were incorporated into the size‐ and age‐at‐maturity analyses. The results indicated that Blacktip Sharks in the Gulf of Mexico have a synchronous, seasonal reproductive cycle and that females exhibit a biennial ovarian cycle. Male and female mating and parturition peaked from March to May. Length at 50% maturity was estimated to be 105.8 and 119.2 cm FL for males and females, respectively, while age at 50% maturity was calculated as 4.8 and 6.3 years. Near‐term pups averaged 38 cm FL, and gestation was approximately 12 months. Litter size was 4.5 pups per female, and fecundity was found to increase with both maternal size and age. Maternal body size—but not age—had a positive influence on offspring fitness. This represents the first comprehensive reproductive study of Blacktip Sharks in the Gulf of Mexico. Received October 1, 2012; accepted December 5, 2012

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Section: Methodsmentioning

confidence: 99%

Reproduction of the Blacktip Shark in the Gulf of Mexico

Baremore

Passerotti

2013

Mar Coast Fish

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“…However, estimated thresholds may not necessarily align with age classes. For example, the estimated size categories for sandbar sharks aligned well with age groups (small; <1.11, medium; 1.11–6.93, large; >6.93 years) but not for blacktip sharks (small; <0.6, large; >0.6 years) based on von Bertalanffy growth model parameters for sexes combined (Deacy & Moncrief‐Cox, 2019; Hale & Baremore, 2014). Limited research has been conducted on whether shifts in habitat utilization occur at specific ages for shark species (Grubbs, 2010).…”

Section: Discussionmentioning

confidence: 99%

Niche structure and habitat shifts for coastal sharks of the US Southeast Atlantic and Gulf of Mexico

O'Brien,

Cortés,

Driggers

et al. 2024

Fisheries Oceanography

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Understanding spatial ecology and predicting animal movements in response to environmental changes, such as anthropogenic climate change and multidecadal variability, is critical for effective conservation strategies. Niche structuring is key to some coastal shark species and size classes coexisting in the US Atlantic and Gulf of Mexico to limit interspecific and intraspecific interaction. Data from four fishery‐independent bottom longline surveys were used to evaluate the abiotic ecological niches of eight species of small and large coastal sharks. Gaussian mixture models separated length composition data into 14 size categories for ecological niche analysis. Generalized additive mixed effect models were fit and coupled with output from dynamic high‐resolution ocean models to predict suitable abiotic habitats, evaluate potential shifts in distribution, and explore the impacts of large‐scale climatological trends on abiotic habitats from 1994 to 2019. The abiotic niche for small coastal sharks generally tended toward warmer, high salinity, shallow bottom waters close to shore. No overarching niche was found for large coastal sharks, but appreciable ontogenetic differences were seen. Most taxa analyzed exhibited declining annual trends in higher quality habitats, particularly during fall months. The analysis provided evidence of shifts north along the Atlantic, to deeper offshore waters in the Atlantic and Gulf of Mexico, and the potential to redistribute in response to multidecadal climate variability for multiple species. The analytical framework described could aid in developing various spatiotemporal management measures, and results provide insight into the habitat characteristics of several species over broad spatiotemporal ranges and through ontogeny.

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“…The difference in average length between the two studies could be due to a smaller sample size in the current study, which may result from fisheries bias. However, this difference could also indicate a lack of older fish in the population (Hale & Baremore, 2013) and in the sample. In a study conducted by Kurniawan et al (2021) in Indonesian waters, similar findings were observed, including a right-skew in the length frequency distribution.…”

Section: Size Compositionmentioning

confidence: 93%

FISHERIES AND BIOLOGICAL INFORMATION OF BOTTLENOSE WEDGEFISH (Rhynchobatus australiae) IN PULAU KAMBING FISH LANDING PORT TERENGGANU

Noor Iskandar,

Fadzli,

Ahmad Sharikin

et al. 2023

UMT JUR

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Rhynchobatus australiae is a species of wedgefish that is vulnerable to overfishing due to their life history characteristics This study aimed to determine the fisheries and biological information of R. australiae in Terengganu waters. A total of 26 fish were collected over a 3-month period in Pulau Kambing Fish Landing Port, Terengganu and analysed for abundance, length frequency distribution, LWRs, and growth parameters. Results showed that the abundance of R. australiae in Terengganu was higher compared to the estimation made in other locations, with a CPUE of 49.05 kg/haul and 9.15 kg/day. The LWRs for males, females, and pooled sexes were a = 0.0057 and b = 2.9404, a = 0.0018, b = 3.2078, and a = 0.0029, b = 3.0979, respectively. The von Bertalanffy Growth parameters for male, female, and pooled sexes of R. australiae were k = 0.035, L∞ = 332.825, t0 = -4.495, k = 1.005, L∞ = 43.161, t0 = -2.99, and k = 0.089, L∞=222.412, t0=-2.565, respectively. Males R. australiae exhibiting a higher average length than females. This study was limited in terms of the time span covered and the sample size, which may have introduced variability in the results and may not be representative of the larger fish population. However, the results of this study may serve as preliminary data for the fish population dynamics of R. australiae in Terengganu waters and could be used to guide future research. Future study with a longer time span and a larger, more diverse sample size are needed to estimate the abundance and size of R. australiae more accurately in this region.

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Age and Growth of the Sandbar Shark (Carcharhinus plumbeus) from the Northern Gulf of Mexico and the Western North Atlantic Ocean

Cited by 4 publications

References 18 publications

Reproduction of the Blacktip Shark in the Gulf of Mexico

Reproduction of the Blacktip Shark in the Gulf of Mexico

Niche structure and habitat shifts for coastal sharks of the US Southeast Atlantic and Gulf of Mexico

FISHERIES AND BIOLOGICAL INFORMATION OF BOTTLENOSE WEDGEFISH (Rhynchobatus australiae) IN PULAU KAMBING FISH LANDING PORT TERENGGANU

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