Age and growth of the gulf toadfish Opsanus beta based on otolith increment analysis

E. Malca, J. F. Barimo, J. E. Serafy, P. J. Walsh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the present study, sagittal otoliths of confirmed male and female specimens of the gulf toadfish Opsanus beta that were collected monthly over the course of a year from Biscayne Bay, Florida, U.S.A. were analysed. The timing and frequency of O. beta spawning seasons are reported by examination of the gonado-somatic index. The estimated ages of males and females ranged from < 1 year to 6 and 5 years, respectively. Strong sexual dimorphism in growth was apparent with von Bertalanffy parameter estimates for males of L = 393·8 mm, K = 0·30, t0 = 0·36 and females of L = 201·1 mm, K = 0·79, t0 = 0·47. Comparison with previously published growth trajectories of the more northerly distributed conspecific Opsanus tau showed that O. beta males had a higher growth rate. Female O. beta and O. tau growth trajectories appear similar, with an indication that the former becomes asymptotic at least a year before the latter. Results are discussed in the context of temperature regimes, reproductive energy allocation and waste urea excretion in the two species.

Original languageEnglish
Pages (from-to)1750-1761
Number of pages12
JournalJournal of Fish Biology
Volume75
Issue number7
DOIs
StatePublished - Nov 1 2009
Externally publishedYes

Fingerprint

otolith
otoliths
Opsanus tau
trajectory
trajectories
sexual dimorphism
excretion
urea
gonadosomatic index
spawning
Opsanus beta
gulf
analysis
energy
temperature

Keywords

  • Age determination
  • Ureotely
  • Von Bertalanffy growth

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics

Cite this

Age and growth of the gulf toadfish Opsanus beta based on otolith increment analysis. / Malca, E.; Barimo, J. F.; Serafy, J. E.; Walsh, P. J.

In: Journal of Fish Biology, Vol. 75, No. 7, 01.11.2009, p. 1750-1761.

Research output: Contribution to journalArticle

Malca, E. ; Barimo, J. F. ; Serafy, J. E. ; Walsh, P. J. / Age and growth of the gulf toadfish Opsanus beta based on otolith increment analysis. In: Journal of Fish Biology. 2009 ; Vol. 75, No. 7. pp. 1750-1761.
@article{be9128d8506b440b873682ef44d0ee08,
title = "Age and growth of the gulf toadfish Opsanus beta based on otolith increment analysis",
abstract = "In the present study, sagittal otoliths of confirmed male and female specimens of the gulf toadfish Opsanus beta that were collected monthly over the course of a year from Biscayne Bay, Florida, U.S.A. were analysed. The timing and frequency of O. beta spawning seasons are reported by examination of the gonado-somatic index. The estimated ages of males and females ranged from < 1 year to 6 and 5 years, respectively. Strong sexual dimorphism in growth was apparent with von Bertalanffy parameter estimates for males of L ∞ = 393·8 mm, K = 0·30, t0 = 0·36 and females of L∞ = 201·1 mm, K = 0·79, t0 = 0·47. Comparison with previously published growth trajectories of the more northerly distributed conspecific Opsanus tau showed that O. beta males had a higher growth rate. Female O. beta and O. tau growth trajectories appear similar, with an indication that the former becomes asymptotic at least a year before the latter. Results are discussed in the context of temperature regimes, reproductive energy allocation and waste urea excretion in the two species.",
keywords = "Age determination, Ureotely, Von Bertalanffy growth",
author = "E. Malca and Barimo, {J. F.} and Serafy, {J. E.} and Walsh, {P. J.}",
year = "2009",
month = "11",
day = "1",
doi = "10.1111/j.1095-8649.2009.02426.x",
language = "English",
volume = "75",
pages = "1750--1761",
journal = "Journal of Fish Biology",
issn = "0022-1112",
publisher = "Wiley-Blackwell",
number = "7",

}

TY - JOUR

T1 - Age and growth of the gulf toadfish Opsanus beta based on otolith increment analysis

AU - Malca, E.

AU - Barimo, J. F.

AU - Serafy, J. E.

AU - Walsh, P. J.

PY - 2009/11/1

Y1 - 2009/11/1

N2 - In the present study, sagittal otoliths of confirmed male and female specimens of the gulf toadfish Opsanus beta that were collected monthly over the course of a year from Biscayne Bay, Florida, U.S.A. were analysed. The timing and frequency of O. beta spawning seasons are reported by examination of the gonado-somatic index. The estimated ages of males and females ranged from < 1 year to 6 and 5 years, respectively. Strong sexual dimorphism in growth was apparent with von Bertalanffy parameter estimates for males of L ∞ = 393·8 mm, K = 0·30, t0 = 0·36 and females of L∞ = 201·1 mm, K = 0·79, t0 = 0·47. Comparison with previously published growth trajectories of the more northerly distributed conspecific Opsanus tau showed that O. beta males had a higher growth rate. Female O. beta and O. tau growth trajectories appear similar, with an indication that the former becomes asymptotic at least a year before the latter. Results are discussed in the context of temperature regimes, reproductive energy allocation and waste urea excretion in the two species.

AB - In the present study, sagittal otoliths of confirmed male and female specimens of the gulf toadfish Opsanus beta that were collected monthly over the course of a year from Biscayne Bay, Florida, U.S.A. were analysed. The timing and frequency of O. beta spawning seasons are reported by examination of the gonado-somatic index. The estimated ages of males and females ranged from < 1 year to 6 and 5 years, respectively. Strong sexual dimorphism in growth was apparent with von Bertalanffy parameter estimates for males of L ∞ = 393·8 mm, K = 0·30, t0 = 0·36 and females of L∞ = 201·1 mm, K = 0·79, t0 = 0·47. Comparison with previously published growth trajectories of the more northerly distributed conspecific Opsanus tau showed that O. beta males had a higher growth rate. Female O. beta and O. tau growth trajectories appear similar, with an indication that the former becomes asymptotic at least a year before the latter. Results are discussed in the context of temperature regimes, reproductive energy allocation and waste urea excretion in the two species.

KW - Age determination

KW - Ureotely

KW - Von Bertalanffy growth

UR - http://www.scopus.com/inward/record.url?scp=72249103616&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=72249103616&partnerID=8YFLogxK

U2 - 10.1111/j.1095-8649.2009.02426.x

DO - 10.1111/j.1095-8649.2009.02426.x

M3 - Article

VL - 75

SP - 1750

EP - 1761

JO - Journal of Fish Biology

JF - Journal of Fish Biology

SN - 0022-1112

IS - 7

ER -