Validated age and growth of Barred Sand Bass within the Southern California Bight
The recreational fishery for Barred Sand Bass (Paralabrax nebulifer) has recently shown declines in catch prompting a need for updating life-history attributes. The objective of this study was to provide a more extensive and current examination of Barred Sand Bass age and growth. Fish were collec...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
California Department of Fish and Wildlife
2020-12-01
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| Series: | California Fish and Wildlife Journal |
| Subjects: | |
| Online Access: | https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=187247&inline |
| Summary: | The recreational fishery for Barred Sand Bass (Paralabrax nebulifer) has
recently shown declines in catch prompting a need for updating life-history
attributes. The objective of this study was to provide a more extensive and
current examination of Barred Sand Bass age and growth. Fish were collected
from the southern California bight from 2011 to 2015. Using Akaike Information Criteria analysis we determined that the three-parameter von Bertalanffy
growth model was the best fit out of the four tested models (Gompertz, Logistic, Power, and von Bertalanffy). Males grew slightly quicker than females
(k, males = 0.10, females = 0.08). Males and females did not differ in length,
weight, or the length-weight relationship. We also validated yearly banding
of Barred Sand Bass with oxytetracycline marking of two fish in captivity for
one year. Location of the first annulus was also validated with otolith diameter
measurements. Finally, we compared the current study to a past 1990’s study
and observed different growth parameters. The growth difference after thirty
years showed that possible fishing pressure and environmental factors might
have influenced changes in growth. This study provides current information
on age, growth over time and, otolith morphometrics, for Barred Sand Bass. |
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| ISSN: | 2689-419X 2689-4203 |