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Impacts of a Non-Native Piscivore, t...

Smith, Geoffrey Henry, Jr.

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Impacts of a Non-Native Piscivore, the Pike Killifish, on Juvenile Common Snook.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Impacts of a Non-Native Piscivore, the Pike Killifish, on Juvenile Common Snook./
Author:	Smith, Geoffrey Henry, Jr.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	218 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
Contained By:	Dissertations Abstracts International82-05B.
Subject:	Ecology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28289369
ISBN:	9798691293320

Impacts of a Non-Native Piscivore, the Pike Killifish, on Juvenile Common Snook.
Smith, Geoffrey Henry, Jr.

Impacts of a Non-Native Piscivore, the Pike Killifish, on Juvenile Common Snook. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 218 p.

Source: Dissertations Abstracts International, Volume: 82-05, Section: B.

Thesis (Ph.D.)--University of Florida, 2019.

Pike Killifish is an established non-native fish species in Florida, US that was first documented in south Florida in 1957 and secondarily in Tampa Bay tributaries in 1994. Decreases in small-bodied fish abundances have been linked to the introduction of Pike Killifish in both of these regions. Increases in the range and abundance of Pike Killifish in the Tampa Bay area and overlap in habitat usage has led to concerns about potential predation on, and competition with, early-juvenile Common Snook (≤100 mm standard length, SL). Several lines of evidence from this dissertation point to minimal or no impacts of Pike Killifish on early-juvenile Common Snook in Tampa Bay tributaries. Predation trials indicate that Pike Killifish are capable of consuming juvenile Common Snook up to 48 mm SL, but no Common Snook remains have been found in the diet analysis of Pike Killifish. There is a small degree of diet overlap between these species and declines in the abundance of some prey groups has been detected in locations where Pike Killifish and Common Snook co-occur. However, diet overlap of earlyjuvenile Common Snook from locations with and without Pike Killifish co-occurring remains high and there is no indication of reduced abundance, condition, or growth of early-juvenile Common Snook in the presence of Pike Killifish. Experimental aquarium habitats showed that Pike Killifish and early-juvenile Common Snook utilized different microhabitats, which helps to explain the lack of negative impacts observed due to competition. Simulation modelling revealed that if negative impacts were present in the form of reduced abundance of Common Snook from predation by Pike Killifish or reduced growth from competition, large reductions in the production of large juvenile Common Snook are possible.

ISBN: 9798691293320Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Piscivore

Impacts of a Non-Native Piscivore, the Pike Killifish, on Juvenile Common Snook.
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245 1 0 $a Impacts of a Non-Native Piscivore, the Pike Killifish, on Juvenile Common Snook.
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300 $a 218 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
500 $a Advisor: Murie, Debra.
502 $a Thesis (Ph.D.)--University of Florida, 2019.
520 $a Pike Killifish is an established non-native fish species in Florida, US that was first documented in south Florida in 1957 and secondarily in Tampa Bay tributaries in 1994. Decreases in small-bodied fish abundances have been linked to the introduction of Pike Killifish in both of these regions. Increases in the range and abundance of Pike Killifish in the Tampa Bay area and overlap in habitat usage has led to concerns about potential predation on, and competition with, early-juvenile Common Snook (≤100 mm standard length, SL). Several lines of evidence from this dissertation point to minimal or no impacts of Pike Killifish on early-juvenile Common Snook in Tampa Bay tributaries. Predation trials indicate that Pike Killifish are capable of consuming juvenile Common Snook up to 48 mm SL, but no Common Snook remains have been found in the diet analysis of Pike Killifish. There is a small degree of diet overlap between these species and declines in the abundance of some prey groups has been detected in locations where Pike Killifish and Common Snook co-occur. However, diet overlap of earlyjuvenile Common Snook from locations with and without Pike Killifish co-occurring remains high and there is no indication of reduced abundance, condition, or growth of early-juvenile Common Snook in the presence of Pike Killifish. Experimental aquarium habitats showed that Pike Killifish and early-juvenile Common Snook utilized different microhabitats, which helps to explain the lack of negative impacts observed due to competition. Simulation modelling revealed that if negative impacts were present in the form of reduced abundance of Common Snook from predation by Pike Killifish or reduced growth from competition, large reductions in the production of large juvenile Common Snook are possible.
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