Predation and Distribution Analysis of Native and Invasive Intertidal Crab Species Across Three Long Island Sites
Başlık:
Predation and Distribution Analysis of Native and Invasive Intertidal Crab Species Across Three Long Island Sites
Yazar:
Del Latto, Michael, author.
ISBN:
9780438106697
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (37 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Aaren Freeman.
Özet:
Globally, invasive species pose a significant risk to many different ecosystems. The native blue crab, Callinectes sapidus (CS), of the Northeast coast of North America, is one such species that is challenged by the invasive competitors Carcinus maenas (CM) and Hemigrapsus sanguineus (HS). Analyzing three sites across Long Island, New York, it was found that C. maenas distribution differed in the Lido site compared to Alder Island and Jones Bay (p < 0.05). Across all sites, an abundance ratio of 2.2:1:0 was produced for CM:CS:HS, meaning that invasive C. maenas outnumber native C. sapidus over 2 to 1. Individual C. maenas and H. sanguineus were tethered at each site for 2 tidal cycles (24 h +/- 1 h) in order to quantify predation frequencies for each area. Directly after predation-tethering, crab traps were deployed for 2 tidal cycles to quantify ambient crab densities. For all sites, H. sanguineus experienced a high level of predation (72.22%, N = 14) while C. maenas experienced a low level of predation (13.89%, N = 14). Laboratory predation experiments showed a similar effect where H. sanguineus survival was negatively affected by C. sapidus and C. maenas. In this way, native C. sapidus do not exhibit biotic control of C. maenas under the condition of similarly matched carapace size. Due to natural differences in the size of adult crab, C. sapidus and C. maenas both have the potential to exhibit control over H. sanguineus populations. Additional sampling over multiple seasons is suggested for future study.
Notlar:
School code: 0001
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(696421.1) | 696421-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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