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

:sage:

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

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

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

I suspect he's already passed or failed that class given it was over a year ago.

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

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:

oh well, learnt a bit on trophic cascades

oh well, learnt a bit on trophic cascades

Indeed, trophic cascades are waaaay trippier than they first appear!

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....