scholarly journals Spatial and temporal movement of the lined shore crab Pachygrapsus crassipes in salt marshes and its utility as an indicator of habitat condition

2006 ◽  
Vol 314 ◽  
pp. 271-281 ◽  
Author(s):  
SG Morgan ◽  
SA Spilseth ◽  
HM Page ◽  
AJ Brooks ◽  
ED Grosholz
Keyword(s):  
Salt Marshes ◽  
Shore Crab ◽  
Habitat Condition ◽  
Pachygrapsus Crassipes

scholarly journals Can The Timing And Duration of Planktonic Larval Development Determine Invasion Success? A Case Study Comparing Range Expansion In The European Green Crab, Carcinus Maenas, And The Native Lined Shore Crab, Pachygrapsus Crassipes, In The North-Eastern Pacific.

2021 ◽  
Author(s):  
Sylvia Behrens Yamada ◽  
Alan L. Shanks ◽  
Richard E. Thomson
Keyword(s):  
West Coast ◽  
Range Expansion ◽  
Carcinus Maenas ◽  
Vancouver Island ◽  
Invasion Success ◽  
Green Crab ◽  
Shore Crab ◽  
The West ◽  
Pachygrapsus Crassipes ◽  
European Green Crab

Abstract Major El Niño events and oceanic heat waves are linked to the range expansion of many marine species. For the shores of the northeast Pacific, we compared range expansion in the European green crab, Carcinus maenas, which was introduced to San Francisco Bay prior to 1990, to that of the native lined-shore crab, Pachygrapsus crassipes, which has existed on the coast since at least the end of the last Ice Age (>10,000 years ago). The initial northern range limit of these species was central California and central Oregon, respectively. Both species increased their northern range along the open coast to northern Oregon, Washington and Vancouver Island after strong El Niño events. C. maenas, however, in just a matter of decades, successfully established populations in inlets on the west coast of Vancouver Island, and possibly also in the Salish Sea, while P. crassipes, in thousands of years, never has. We hypothesize that this difference in invasion success is due to the shorter larval duration of C. maenas, < 2 months, compared to that of P. crassipes, 3-4 months and timing of larval release, winter for both species. Because the residency times of water in the inlets of the west coast of Vancouver Island are ~1-2 months, they can act as an incubator for the larvae of C. maenas, while those of P. crassipes are likely flushed out to the open sea before they can complete their development.

Bioenergetic responses of a benthic forage fish (Fundulus heteroclitus) to habitat degradation and altered prey community in polluted salt marshes

2010 ◽  
Vol 67 (10) ◽  
pp. 1566-1584 ◽  
Author(s):  
Daisuke Goto ◽  
William G. Wallace
Keyword(s):  
Food Consumption ◽  
Salt Marshes ◽  
Fundulus Heteroclitus ◽  
Balance Model ◽  
Compensatory Mechanism ◽  
Habitat Condition ◽  
Lower Growth ◽  
Metabolic Costs ◽  
Consumption Rates ◽  
Benthic Prey

In this study, we examined bioenergetic responses of age-2+ and age-3+ mummichogs ( Fundulus heteroclitus ) to degraded habitat condition and impoverished benthic prey community in polluted salt marshes by incorporating in situ food consumption rates with the mercury mass balance model technique. In general, bioenergetic responses of mummichogs appeared to be more related to benthic prey community than habitat condition. Fish from prey-impoverished marsh (PIM) sites generally had significantly elevated total metabolic costs compared with those from non-prey-impoverished marsh (NPIM) sites. However, the PIM populations also had ~two- to three-fold higher consumption rates than the NPIM populations, suggesting that the PIM populations may be capable of adjusting food consumption to offset elevated metabolic costs. Furthermore, only age-2+ females of the PIM populations had significantly reduced growth rates, whereas there was little among-site differences for age-2+ males and age-3+ fish, indicating that an increased consumption by the PIM populations may also have been a compensatory mechanism to maintain growth. Most of the PIM populations, however, had substantially (up to 80%) lower growth conversion efficiency relative to the NPIM populations. These findings suggest that pollution-tolerant fishes such as mummichogs may have energetic costs of living in chronically degraded habitats.

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