Age and growth of the blacknose shark, Carcharhinus acronotus, in the western North Atlantic Ocean with comments on regional variation in growth rates

Driggers, William B.; Carlson, John K.; Cullum, B. J.; Dean, John Mark; Oakley, D.J.

doi:10.1007/s10641-004-0105-z

Cited by 51 publications

(59 citation statements)

References 16 publications

(26 reference statements)

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“…Quantitative methods to determine mortality and susceptibility, particularly those that incorporate fecundity (Smith et al 1998), are therefore required to determine whether the above assumption is correct. Last, as the biology of L. macrorhinus from Hervey Bay differed from that in other locations, it is recommended that further studies be conducted on this species, because regional variations in life history are likely (Driggers et al 2004a;Piercy et al 2007). Therefore, research on a local scale should be encouraged and populations of L. macrorhinus should be managed with a cautionary approach in the absence of regionally specific life-history data and quantitative mortality assessments.…”

Section: Discussionmentioning

confidence: 99%

Life-history traits of a small-bodied coastal shark

Gutteridge

Huveneers

Marshall³

et al. 2013

Mar. Freshwater Res.

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Abstract. The life histories of small-bodied coastal sharks, particularly carcharhinids, are generally less conservative than those of large-bodied species. The present study investigated the life history of the small-bodied slit-eye shark, Loxodon macrorhinus, from subtropical Hervey Bay, Queensland, and compared this species' biology to that of other coastal carcharhinids. The best-fit age model provided parameters of L N ¼ 895 mm total length (TL), k ¼ 0.18 and t 0 ¼ À6.3 for females, and L N ¼ 832 mm TL, k ¼ 0.44 and t 0 ¼ À2.6 for males. For sex-combined data, a logistic function provided the best fit, with L N ¼ 842 mm TL, k ¼ 0.41 and a ¼ À2.2. Length and age at which 50% of the population was mature was 680 mm TL and 1.4 years for females, and 733 mm TL and 1.9 years for males. Within Hervey Bay, L. macrorhinus exhibited an annual seasonal reproductive cycle, producing an average litter of 1.9 AE 0.3 s.d. With the exception of the low fecundity and large size-at-birth relative to maximum maternal TL, the life-history traits of L. macrorhinus are comparable to other small-bodied coastal carcharhinids, and its apparent fast growth and early maturation contrasts that of large-bodied carcharhinids.

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Section: Discussionmentioning

confidence: 99%

Life-history traits of a small-bodied coastal shark

Gutteridge

Huveneers

Marshall³

et al. 2013

Mar. Freshwater Res.

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“…Individual sharks of each species were categorized into life stages based on published lengths at maturity (Clark & von Schmidt 1965, Castro 1993, Henningsen 2000, Driggers et al 2004, umbilical scar condition, and the degree of clasper calcification: young of the year (YOY; umbilical scar open or healed, but still visible), juvenile (healed umbilical scar; males with soft, uncalcified claspers and rhipidion not extensible, females based on length), and adult (males with hardened, calcified claspers, rhipidion extensible, females based on length). Some juvenile sharks were further classified as early juveniles by their small size and often faint presence of a healed umbilical scar.…”

Section: Methodsmentioning

confidence: 99%

First characterization of shark nursery habitat in the United States Virgin Islands: evidence of habitat partitioning by two shark species

DeAngelis¹,

McCandless²,

Kohler³

et al. 2008

Mar. Ecol. Prog. Ser.

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Little is known of the diversity, demography, and essential fish habitat of sharks within the United States Virgin Islands (USVI) marine ecosystem. To examine species diversity and the relative abundance of elasmobranchs in this region, bottom-longline and hand-gear sampling was con- . Lemon sharks Negaprion brevirostris had the highest relative abundance based on log-transformed CPUE data (0.98 ± 0.15), followed by blacktip sharks Carcharhinus limbatus (0.91 ± 0.18), southern stingrays Dasyatis americana (0.28 ± 0.08), nurse sharks Ginglymostoma cirratum (0.08 ± 0.05), blacknose sharks Carcharhinus acronotus (0.06 ± 0.04) and the Caribbean sharpnose Rhizoprionodon porosus (0.03 ± 0.03). The relative abundance of all species was significantly higher in the summer (2.6 ± 0.2) than during the winter (1.1 ± 0.2). For the blacktip (N = 89 captures of 74 individuals) and lemon (N = 66, 48 individuals) sharks, which comprised the bulk of the catch, mean fork length (± SE) was 51.9 ± 0.63 cm and 59.9 ± 1.2 cm, respectively, representing primarily neonatal and young-of-the-year life stages. The recapture rates for blacktip and lemon sharks were 21% and 29%, respectively, and nearly all recaptures occurred within the bay, indicating a high degree of site fidelity. Capture information and limited acoustic tracking provided evidence of spatial and temporal habitat partitioning by these 2 shark species within the bay. Although the CPUE of both species was highest over shallow (<1 m) seagrass substrate, lemon sharks were found and tracked exclusively on shallow, mangrove-fringed seagrass habitat, while blacktip sharks utilized a wider area of the bay. Fish Bay was determined to provide important nursery habitat for young juvenile lemon and blacktip sharks in the USVI.

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“…TL (Parsons 2006). Age and growth was studied for the blacknose shark in the Atlantic Ocean and Gulf of Mexico (Carlson et al 1999;Driggers et al 2004). Males mature at about 100-110 cm (39.4-43.3 in.…”

Section: Blacknose Sharkmentioning

confidence: 99%

Fish Resources of the Gulf of Mexico

Chen

2017

Habitats and Biota of the Gulf of Mexico: Before the Deepwater Horizon Oil Spill

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Age and growth of the blacknose shark, Carcharhinus acronotus, in the western North Atlantic Ocean with comments on regional variation in growth rates

Cited by 51 publications

References 16 publications

Life-history traits of a small-bodied coastal shark

Life-history traits of a small-bodied coastal shark

First characterization of shark nursery habitat in the United States Virgin Islands: evidence of habitat partitioning by two shark species

Fish Resources of the Gulf of Mexico

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