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Life History of Spiny Dogfish off the Northeastern United States
Author(s) -
Nammack Marta F.,
Musick J. A.,
Colvocoresses J. A.
Publication year - 1985
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1985)114<367:lhosdo>2.0.co;2
Subject(s) - spiny dogfish , squalus acanthias , chondrichthyes , biology , range (aeronautics) , dorsum , zoology , reproduction , anatomy , ecology , endocrinology , materials science , composite material
This report describes the age, growth, and reproductive biology of the spiny dogfish Squalus acanthias off the northeastern U.S. Analysis of growth rings on dorsal fin spines yielded yon Bertalanffy growth coefficients (K) and asymptotic total lengths (L ∞ ) of K = 0.1481, L ∞ = 82.49 cm for males, and K = 0.1057, L ∞ = 100.5 cm for females. Median lengths and ages at maturity were 79.9 cm and 12.1 years for females and 59.5 cm and 6.0 years for males. The average number of young for females at the modal size range (90–94 cm) was 5.8; litter size ranged from 1 to 15 embryos every 2 years. Received March 12, 1984 Accepted March 12, 1985