John Wiley results 26
· Newest (Page 1/2, per page 25)
Author: John Wiley ×Clear All Filters
Search Results
Age‐based life‐history information provides a foundation for evaluating population dynamics and vulnerability of coral reef fishes, yet many commercially important species from the tropical western Pacific remain poorly characterized. In this study, we examined the age, growth, and reproductive life histories of three reef‐associated species harvested in Guam's commercial fishery: the blacktip grouper Epinephelus fasciatus , t...
Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at‐sea threat...
Age-Based Demography of Two Parrotfish and a Goatfish from Saipan, Northern Mariana IslandsOA Marine
The age-based life history of two commercially important parrotfishes (Labridae: tribe Scarinae) and one goatfish (Mullidae) were characterized based on the commercial nearshore fishery in Saipan, Commonwealth of the Northern Mariana Islands. Age, growth, reproduction, and mortality were derived from fishery-dependent samples using sagittal otoliths and gonads for the stareye parrotfish Calotomus carolinus, pacific bullethead...
Patterns of cohort decline are key demographic traits that provide a unique temporal perspective vital to understanding population dynamics. The discovery of multidecadal lifespans in tropical surgeonfishes in the 1990s created a paradigm shift to the notion that they are highly vulnerable species with low population recovery rates; however, research into the mortality patterns of surgeonfishes (Acanthuridae) has been sparse u...
Life history of the endemic Hawaiian hogfish Bodianus albotaeniatus : age, growth and reproductionNARA Subscribed
Growth rate, longevity, maturity and spawning seasonality were estimated for the endemic Hawaiian hogfish Bodianus albotaeniatus . The sex‐specific von Bertalanffy growth parameters are L ∞ = 339 mm fork length ( L F ) and K = 0.66 year −1 for females and L ∞ = 417 mm L F and K = 0.33 year −1 for males. The maximum age is 22 years. Histological gonad analysis and the absence of small and young males indicate a monandric protog...
This study provides estimates of growth rate, longevity, maturity, spawning seasonality and mortality for Hawai'i's only lethrinid, the humpnose big‐eye bream (known as Mū in Hawai'i) Monotaxis grandoculis , a commercially and recreationally important species in Hawai'i and throughout the Indo‐Pacific. M . grandoculis reaches maturity at 303 mm fork length or 3.6 years of age for both sexes. Males were significantly larger tha...
Age, growth and maturity for two highly targeted jack species: Caranx ignobilis and Caranx melampygusNARA Subscribed
This study provides growth rate, longevity and maturity estimates for the two important species of jack in Hawaiʻi: ulua aukea/giant trevally Caranx ignobilis and omilu/bluefin trevally Caranx melampygus . Maximum observed ages for C. ignobilis and C. melampygus were 31 years and 24 years, respectively. Combined sex von Bertalanffy growth parameter values for C. ignobilis and C. melampygus were as follows: L ∞ = 1064 mm and K...