Validated age and growth of the sandbar shark, Carcharhinus plumbeus (Nardo 1827) in the waters off Western Australia

McAuley, Rory; Simpfendorfer, Colin A.; Hyndes, Glenn A.; Allison, Rick R.; Chidlow, Justin A.; Newman, Stephen; Lenanton, R.C.J.

doi:10.1007/978-1-4020-5570-6_17

Cited by 9 publications

(16 citation statements)

References 26 publications

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“…4A,B). The increase in error between readers was likely due to an increase in difficulty of age interpretation of the bands on the edges of the vertebrae in the oldest fish (McAuley et al, 2006). Additionally, the low sample size of sandbar sharks older than 19 yr magnified the differences in age estimation between the readers (McAuley et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

“…The increase in error between readers was likely due to an increase in difficulty of age interpretation of the bands on the edges of the vertebrae in the oldest fish (McAuley et al, 2006). Additionally, the low sample size of sandbar sharks older than 19 yr magnified the differences in age estimation between the readers (McAuley et al, 2006). The Bowker's and McNemar x 2 test of symmetry showed no systematic ageing bias between readers (no consistent over-or underageing between readers); however, within readers there was a marginally significant difference (, 0.05) between the first read and the final age determination (Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…To date, validation for the annual periodicity of band formation is limited to neonates (Branstetter, 1987) and younger age classes in the U.S. Atlantic Ocean (Casey et al, 1985) and Australian sandbar sharks up to 8 yr old (McAuley et al, 2006). Other methods of band deposition verification were not considered for this study due to the paucity of animals with fewer than six band pairs: band pairs in older individuals were stacked and difficult to accurately measure.…”

Section: Discussionmentioning

confidence: 99%

“…A portion of the vertebral column was removed from behind the head anterior to the origin of the first dorsal fin (McAuley et al, 2006). Vertebrae were frozen and sent to the Panama City NMFS laboratory for processing.…”

Section: Methodsmentioning

confidence: 99%

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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

Hale

Baremore

2013

goms

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Age and growth analysis of the sandbar shark, Carcharhinus plumbeus, from the northern Gulf of Mexico and western North Atlantic Ocean was completed with vertebral samples (n = 1,194). Three parameter von Bertalanffy growth curves were run for male and female sandbar sharks separately, and growth parameters were estimated: theoretical maximum length (L ' ) = 172.9 ± 1.3 cm straight-line fork length [FL], growth coefficient (k) = 0.15 ± 0.01 yr 21 , x-intercept (t 0 ) = 22.3 ± 0.2 SE (male); and L ' = 181.2 ± 1.5 cm FL, k = 0.12 ± 0.01 yr 21 , t 0 = 23.1 ± 0.2 SE (female).The oldest sandbar shark was a 27-yr-old female, and the oldest male was 22 yr old. The age and growth parameters estimated during this study differed from those in previous studies. The differences in the age and growth parameters may indicate growth overfishing, or they may be due to the bias in sampling from a fishery that targets a limited size range of sharks.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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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

Hale

Baremore

2013

goms

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“…In the VIMS and NMFS surveys, sharks were euthanized and a minimum of five vertebral centra were removed from behind the head just anterior to the origin of the first dorsal fin (McAuley et al 2006). Centra collected by the CSFOP were removed from the anterior section of the "log" or carcass.…”

Section: Methodsmentioning

confidence: 99%

Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico

Romine

Musick²,

Johnson³

2013

Mar Coast Fish

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The number of Sandbar Sharks Carcharhinus plumbeus in the western North Atlantic Ocean has experienced a drastic decline since the early 1980s, reaching a minimum during the early 1990s. Catch rates in the early 1990s were a mere 25% of those during the 1980s. According to several fishery‐independent surveys, the low point in Sandbar Shark abundance followed a period of high exploitation. Growth models fit to age–length data collected from 1980 to 1983 and from 2001 to 2004 were compared to investigate potential changes in parameter estimates that might reveal compensatory responses in the Sandbar Shark population. Statistical differences were found between the model parameters for the two time periods, but the differences in growth rates were minimal. The parameters from the three‐parameter von Bertalanffy growth model for female sharks during the 1980–1983 and 2000–2004 time periods were as follows: L∞ = 188.4 and 178.3 cm FL; k = 0.084 and 0.106; and t 0 = −4.097 and −3.41. For males the growth parameters were as follows: L∞ = 164.63 and 173.66 cm; k = 0.11 and 0.11; and t 0 = −3.62 and −3.33. The estimated age at 50% maturity for female Sandbar Sharks changed from 15 years to 12.49 years between the two time periods. Received December 21, 2012; accepted March 28, 2013

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Improving age, growth, and maturity estimates for aseasonally reproducing chondrichthyans

2010

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Validated age and growth of the sandbar shark, Carcharhinus plumbeus (Nardo 1827) in the waters off Western Australia

Cited by 9 publications

References 26 publications

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

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

Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico

Improving age, growth, and maturity estimates for aseasonally reproducing chondrichthyans

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