Printer Friendly

Exotic fish species and their impacts on small coastal lagoons in Southern California. (Abstracts).

Both freshwater and estuarine exotic (non-native) fish species impact small souther California coastal lagoons. In the seven small lagoons (0.5-50 hectares) on Marine Corps Base Camp Pendleton, the larger of these lagoons are more impacted by exotics because they have larger drainages upstream that support freshwater exotic, primarily mosquitofish, sunfishes and black basses, and catfishes. The smaller of these lagoons have fewer upstream sources and more seasonal drying upstream that impede downstream movement by exotics. Marine invasion has been documented for two exotic species, yellowfin goby and striped bass, both particularly facilitated by the latest El Nino-La Nina cycle. The El Nino coincided with a large increase in yellowfin goby recruitment in the Santa Margarita estuary and the only occurrence of this goby in several smaller systems. Increased numbers of striped bass arrived later during the following La Nina. There appears to be a strong negative correlation of mosquitofish with tidewater goby s uccess at some sites. The federally endangered tidewater goby appears to do best in the smallest sites without mosquitofish. The striped bass were few in number and apparently had little impact and the increase of yellowfin gobies was relatively short lived, as the influx of other southern native forms, that their effect was relatively fleeting.

Camm C. Swift (1) and Dan C. Holland (2)
COPYRIGHT 2002 Southern California Academy of Sciences
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2002 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Author:Swift, Camm C.; Holland, Dan C.
Publication:Bulletin (Southern California Academy of Sciences)
Article Type:Brief Article
Geographic Code:1U9CA
Date:Aug 1, 2002
Previous Article:Exotic aquatic turtles on the west coast: considerations and implications. (Abstracts).
Next Article:Invader in the open sea! The New Zealand marine snail Philine auriformis in Southern California coastal waters. (Abstracts).

Related Articles
Aquatic invasive species in the coastal west: an analysis of state regulation within a federal framework.
Two if by sea: invasive species are changing the ocean environment. (Currents).
Post-restoration long-term monitoring for the Batiquitos Lagoon enhangement project. (Abstracts).
Are Southern California's changing coastal waters and nearshore biological communities becoming more susceptible to invasion by exotic sea weeds?...
The marine invaders of California: lessons from San Francisco and San Diego. (Abstracts).
Invader in the open sea! The New Zealand marine snail Philine auriformis in Southern California coastal waters. (Abstracts).
Tropical fish species as indicator of 1997-1998 El Nino in Bahia de San Quintin, Baja California, Mexico.
Habitat utilization by the reproductive stock of the brown shrimp Farfantepenaeus californiensis in the central Gulf of California.

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters