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- Title
- A Method for Estimating Egg Numbers in Egg Clutches of The Exotic Apple Snail Pomacea maculata Without Affecting Clutch Viability.
- Creator
- Cantaloube, Michael, Markwith, Scott, Sharfstein, Bruce, Monette, Dean
- Abstract/Description
-
The exotic apple snail Pomacea maculata appears to be gradually extending its range and increasing its density through much of south Florida. As a consequence, there is increasing interest in understanding its life history. One difficulty encountered in studying P. maculata is that it lays large, multilayered clutches of very small eggs that are impossible to count without disaggregating the egg mass; which results in the loss of viability. Using a previously described dis-aggregation...
Show moreThe exotic apple snail Pomacea maculata appears to be gradually extending its range and increasing its density through much of south Florida. As a consequence, there is increasing interest in understanding its life history. One difficulty encountered in studying P. maculata is that it lays large, multilayered clutches of very small eggs that are impossible to count without disaggregating the egg mass; which results in the loss of viability. Using a previously described dis-aggregation technique, we weighed, dis-aggregated, photographed, and counted 70 egg masses of P. maculata collected from various locations in Lake Okeechobee. Using the resulting mass and egg numbers we developed an algorithm that reliably relates clutch mass to the number of eggs in a clutch, allowing the estimation of the number of eggs in a clutch without impacting the eggs’ viability and paving the way for investigations into studies on fecundity, hatching rate, etc.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA0005004
- Subject Headings
- College students --Research --United States.
- Format
- Document (PDF)
- Title
- Examining Consumption Behavior differences between Pomacea maculata and Pomacea paludosa on Vallisneria americana.
- Creator
- Olavarria, Adriana, Markwith, Scott, Ewe, Sharon, Monette, Dean
- Abstract/Description
-
Pomacea maculata is invading Florida’s freshwater ecosystems. P. maculata is potentially competing with native Pomacea paludosa. However very little work has looked at the consumption behavior to Vallisneria americana. V. Americana, a restoration plant used by resource managers provides important habitat to nursery species. This study examines P. maculata and P. paludosa’s rate of physical, herbivory, and total damage on V. americana. Our results show P. maculata and P. paludosa demonstrate...
Show morePomacea maculata is invading Florida’s freshwater ecosystems. P. maculata is potentially competing with native Pomacea paludosa. However very little work has looked at the consumption behavior to Vallisneria americana. V. Americana, a restoration plant used by resource managers provides important habitat to nursery species. This study examines P. maculata and P. paludosa’s rate of physical, herbivory, and total damage on V. americana. Our results show P. maculata and P. paludosa demonstrate an average rate of physical damage of 2.5 cm/hr and 1.2 cm/hr, herbivory rates of 1.8 cm/hr and 0.2 cm/hr and total physical damage rates of 4.2 cm/hr and 1.4 cm/hr respectively; and with t-values of 0.180, 0.006, and 0.024 respectively. This study illustrates P. maculata herbivory is significantly greater compared to P. paludosa herbivory, and total damage rates but not physical damage. Resource managers need to consider these higher rates when planning to use V. Americana.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA0005032
- Subject Headings
- College students --Research --United States.
- Format
- Document (PDF)
- Title
- Resource use, competition, grazing behavior, and ecosystem invasion impacts of Pomacea maculata.
- Creator
- Monette, Dean J., Markwith, Scott, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
- Abstract/Description
-
Invasion of exotic species is a global threat to native species, biological diversity, and ecological restoration projects. Pomacea maculata is a macrophyte herbivore often misidentified with one of the world’s most invasive and destructive exotic snail, Pomacea canaliculata, but has a broader geographical distribution and climate tolerance, and greater egg production. This research examines whether the exotic P. maculata and native Pomacea paludosa occupy identical vegetation communities,...
Show moreInvasion of exotic species is a global threat to native species, biological diversity, and ecological restoration projects. Pomacea maculata is a macrophyte herbivore often misidentified with one of the world’s most invasive and destructive exotic snail, Pomacea canaliculata, but has a broader geographical distribution and climate tolerance, and greater egg production. This research examines whether the exotic P. maculata and native Pomacea paludosa occupy identical vegetation communities, mechanisms of interference competition, grazing impact differences on Vallisneria americana and to develop an exploratory agent based model. This model uses historical and present data to project how differences between species in life history and grazing patterns can potentially impact South Florida ecosystems. This model examined how P. maculate invasion of South Florida could affect two of the Central Everglades Planning Project’s main environmental restoration goals: function of key vegetative communities and conservation of endangered or threatened species.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00004309, http://purl.flvc.org/fau/fd/FA00004309
- Subject Headings
- Competition (Biology), Ecosystem management -- Florida, Florida applesnail -- Ecology, Florida applesnail -- Environmental aspects, Florida applesnail -- Habitat, Pomacea maculata -- Florida, Wildlife conservation -- Florida
- Format
- Document (PDF)
