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Early life history growth and settlement dynamics of a tropical reef fish (Gobiidae : = Bathygobius coalitus).

Record Type:	Electronic resources : Monograph/item
Title/Author:	Early life history growth and settlement dynamics of a tropical reef fish (Gobiidae :/
Reminder of title:	Bathygobius coalitus).
Author:	Shafer, David John.
Description:	1 online resource (156 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 60-09, Section: B.
Contained By:	Dissertations Abstracts International60-09B.
Subject:	Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9913964click for full text (PQDT)
ISBN:	9780599123403

Early life history growth and settlement dynamics of a tropical reef fish (Gobiidae : = Bathygobius coalitus).
Shafer, David John.

Early life history growth and settlement dynamics of a tropical reef fish (Gobiidae :Bathygobius coalitus). - 1 online resource (156 pages)

Source: Dissertations Abstracts International, Volume: 60-09, Section: B.

Thesis (Ph.D.)--University of Hawai'i at Manoa, 1998.

Includes bibliographical references

A Hawaiian intertidal population of the basalt go by (Gobiidae: Bathygobius coalitus) was studied to determine the dynamics and interactions among variable larval growth rates, size and age at settlement juvenile growth rates, and seasonal changes in ambient water temperature. Robust daily periodicity of primary increments in sagittal otoliths, isometric somatic-otolith scaling, and the formation of a settlement mark were validated and used for reconstruction of hatch and settlement dates, mean daily pre- and post-settlement growth rates, size and age at settlement, and individual growth histories during early post-settlement life history of the basalt goby. B. coalitus grew rapidly during the first nine months of life, attaining 55% of its maximum size of 11.4 cm total length (TL). Mean daily growth rates were not correlated between pre- and post-settlement life stages, but were faster during post-settlement life history. Growth rates were more rapid during warmer sea surface temperatures (SST), increasing by 0.01 mm TL d−1 per °C. Larval durations ranged between 29 and 50 days (mean ± sd, 36.8 ± 5.3), and size at settlement ranged between 7.02 and 10.60 min TL (8.36 ± 0.76 mm TL). Size at settlement increased curvilinearly with larval duration and both decreased during warmer SST. Increases in variation in size within cohorts during post-settlement life history predominately occurred during warm SST, whereas decreases in variability predominately occurred during cool SST. The order of size rankings at settlement was typically preserved through early post-settlement life history, and recruits settling larger than the mean size at a particular age at settlement in a cohort tended to remain larger at age later in life history. Growth rate typically increased to a maximum at 20-30 days post-settlement and was unrelated to size at settlement. Dynamics and interactions among variable growth rates, larval duration, size at settlement and ambient water temperatures may have significant consequences for recruitment, survival to maturity, and the ecology of local, open populations of tropical reef fishes.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9780599123403Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Bathygobius coalitusIndex Terms--Genre/Form:

542853
Electronic books.

Early life history growth and settlement dynamics of a tropical reef fish (Gobiidae : = Bathygobius coalitus).
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245 1 0 $a Early life history growth and settlement dynamics of a tropical reef fish (Gobiidae : $b Bathygobius coalitus).
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500 $a Source: Dissertations Abstracts International, Volume: 60-09, Section: B.
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504 $a Includes bibliographical references
520 $a A Hawaiian intertidal population of the basalt go by (Gobiidae: Bathygobius coalitus) was studied to determine the dynamics and interactions among variable larval growth rates, size and age at settlement juvenile growth rates, and seasonal changes in ambient water temperature. Robust daily periodicity of primary increments in sagittal otoliths, isometric somatic-otolith scaling, and the formation of a settlement mark were validated and used for reconstruction of hatch and settlement dates, mean daily pre- and post-settlement growth rates, size and age at settlement, and individual growth histories during early post-settlement life history of the basalt goby. B. coalitus grew rapidly during the first nine months of life, attaining 55% of its maximum size of 11.4 cm total length (TL). Mean daily growth rates were not correlated between pre- and post-settlement life stages, but were faster during post-settlement life history. Growth rates were more rapid during warmer sea surface temperatures (SST), increasing by 0.01 mm TL d−1 per °C. Larval durations ranged between 29 and 50 days (mean ± sd, 36.8 ± 5.3), and size at settlement ranged between 7.02 and 10.60 min TL (8.36 ± 0.76 mm TL). Size at settlement increased curvilinearly with larval duration and both decreased during warmer SST. Increases in variation in size within cohorts during post-settlement life history predominately occurred during warm SST, whereas decreases in variability predominately occurred during cool SST. The order of size rankings at settlement was typically preserved through early post-settlement life history, and recruits settling larger than the mean size at a particular age at settlement in a cohort tended to remain larger at age later in life history. Growth rate typically increased to a maximum at 20-30 days post-settlement and was unrelated to size at settlement. Dynamics and interactions among variable growth rates, larval duration, size at settlement and ambient water temperatures may have significant consequences for recruitment, survival to maturity, and the ecology of local, open populations of tropical reef fishes.
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773 0 $t Dissertations Abstracts International $g 60-09B.
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