jc254 Posted August 28, 2011 Report Share Posted August 28, 2011 These questions have gotten past me! im allowed to ask for help its been cleared lol Which of the following is NOT likely to apply to the dynamics of open populations? Choose one answer. a. organisms are highly mobile, often with complex life cycles involving multiple life history stages b. dispersal between habitat patches is common c. abundance of a subsequent generation at a site is closely linked to local production of recruits at the site d. recruitment has a large influence on the population dynamics at local sites The proponents of a proposal to build a dam argue that reduced flood-related disturbance associated with a more stable flow regime below the dam will enhance salmonid fisheries due to increased prey supplies. What could be the biggest FLAW in their logic: Choose one answer. a. disturbance quite often restricts stream productivity b. a trade-off between vulnerability to predation and vulnerability to disturbance c. salmonid recruitment is often controlled by flow regime d. dams alter downstream physic-chemical conditions Which of the following is likely to be associated with reduced strength of top-down indirect effects from predators to resources: Choose one answer. a. a predator that has strong effects on the trophic level below it b. increased trophic omnivory c. a non-consumptive interaction between predator and herbivore d. a primarily detrital-based food web What native fish species has failed to recolonise the area in the eastern North Island that was covered by ash during the Taupo eruption (186 AD)? Choose one answer. a. Cran's bully b. Longfin eel c. Inanga d. Bluegill bully Survival rates can be highly variable during different stages of a diadromous fish’s life cycle. Which of the following (that influence fish survival) do conservation/fisheries managers have the least control over? Choose one answer. a. Availability of egg-laying habitat b. Survival of larvae at sea c. Quality of upstream passage for whitebait d. Quantity of adult habitat Any help would be great thanks I have a rough idea on some of these but unsure Quote Link to comment Share on other sites More sharing options...
livingart Posted August 29, 2011 Report Share Posted August 29, 2011 :sage: Quote Link to comment Share on other sites More sharing options...
Aquila Posted August 30, 2011 Report Share Posted August 30, 2011 I can help with these: Which of the following is NOT likely to apply to the dynamics of open populations? Choose one answer. c. abundance of a subsequent generation at a site is closely linked to local production of recruits at the site The proponents of a proposal to build a dam argue that reduced flood-related disturbance associated with a more stable flow regime below the dam will enhance salmonid fisheries due to increased prey supplies. What could be the biggest FLAW in their logic: Choose one answer. c. salmonid recruitment is often controlled by flow regime What native fish species has failed to recolonise the area in the eastern North Island that was covered by ash during the Taupo eruption (186 AD)? Choose one answer. d. Bluegill bully (guess because i don't know the area the question is refering to) Survival rates can be highly variable during different stages of a diadromous fish’s life cycle. Which of the following (that influence fish survival) do conservation/fisheries managers have the least control over? b. Survival of larvae at sea Quote Link to comment Share on other sites More sharing options...
Stella Posted September 19, 2012 Report Share Posted September 19, 2012 What native fish species has failed to recolonise the area in the eastern North Island that was covered by ash during the Taupo eruption (186 AD)? Choose one answer. a. Cran's bully b. Longfin eel c. Inanga d. Bluegill bully Try again McDowall, R. M. (1996). "Volcanism and freshwater fish biogeography in the northeastern North Island of New Zealand." Journal of Biogeography 23(2): 139-148. http://onlinelibrary.wiley.com/doi/10.1046/j.1365-2699.1996.00960.x/abstract Quote Link to comment Share on other sites More sharing options...
F15hguy Posted September 19, 2012 Report Share Posted September 19, 2012 I would go for Crans bully as its the only one I haven't found around here btw that predator one is really strangely worded Quote Link to comment Share on other sites More sharing options...
Ira Posted September 19, 2012 Report Share Posted September 19, 2012 I suspect he's already passed or failed that class given it was over a year ago. Quote Link to comment Share on other sites More sharing options...
F15hguy Posted September 19, 2012 Report Share Posted September 19, 2012 Which of the following is likely to be associated with reduced strength of top-down indirect effects from predators to resources: Choose one answer. a. a predator that has strong effects on the trophic level below it b. increased trophic omnivory c. a non-consumptive interaction between predator and herbivore d. a primarily detrital-based food web I would go for B as with increased trophic omnivory the effects of a predator indirectly affecting a trophic level it doesnt directly prey upon would be reduced Quote Link to comment Share on other sites More sharing options...
Stella Posted September 19, 2012 Report Share Posted September 19, 2012 I suspect he's already passed or failed that class given it was over a year ago. lol random! Wonder how it appeared in my latest posts? Maybe I actually time travelled for a moment....! coooooooooooooool :spop: Quote Link to comment Share on other sites More sharing options...
livingart Posted September 19, 2012 Report Share Posted September 19, 2012 Quote Link to comment Share on other sites More sharing options...
F15hguy Posted September 19, 2012 Report Share Posted September 19, 2012 oh well, learnt a bit on trophic cascades Quote Link to comment Share on other sites More sharing options...
Stella Posted September 19, 2012 Report Share Posted September 19, 2012 oh well, learnt a bit on trophic cascades Indeed, trophic cascades are waaaay trippier than they first appear! Quote Link to comment Share on other sites More sharing options...
F15hguy Posted September 19, 2012 Report Share Posted September 19, 2012 seems simple to begin with, but the complexity of a top down cascade can be quite interesting. would love to see what NIWA was thinking releasing all those kingi's into the hauraki gulf.... Quote Link to comment Share on other sites More sharing options...
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