Holdover fish suffer from lack of nutrients needed in sufficient levels to keep a fish healthy. The results of this are quite evident on the fish. Some people report "dull" coloration, lesions, and in extreme cases, as evident in fish we have taken during the winter months, the "ick". "Ick" is a white-ish coating that covers the fish. Lack of proper nutrition affects the fish in many ways as does thier slowed metabolism. If the metabolism rate is slowed but the fish finds, when they need it, food, the fish will thin and the overall coloration will dull as a result but overall thier physical health will not be drastically affected. ( bass change in coloration moderately to match thier environment whether healthy or not but loss of body fat through a slowed metabolism is a noticeably different condition). When they experience both the slowing of thier metabolism and insufficient food when it is needed ( they might only feed once a week in mid winter with water surface temps below 45 degrees or maybe once every couple when the surface temps get to or below freezing.)
The "ick) results from those conditions, near freezing temperatures and the lack of food. Usually these conditions occur in esturaies, salt creeks etc as opposed to larger river systems and bays where water depths can reach 30 or more feet. The fishes physical health deteriorates to the point where the body, not having any new nutritional source, loses it's ability to produce slime and add additional fat reserves so muscle is absorbed. It litterally starts to feed on itself in it's struggle to survive even though it's physical activity and movements may be limited to staying stationary in a tidal flow and turning to face which ever way the current flows. Fin rot sets in and the membrane between the fin rays disolves.
Dull fish display a grayish semi transparent sheen and thier muscular structure is slightly atrophic, soft, though they are healthy, a valid sign that they may have held over. Bright fish are just that, bright silvery and high gloss. They are usually hard when held prior to release, muscular and vibrant after swimming almost 1000 miles and feeding all the way. Lice can be found on either holdover or newly arrived fish and are transmitted by each other though the newly migrated fish stand a better chance of having them as the schools they travel in will be of bigger numbers than the holdover fish.
Come April the early arrivals mix with the holdover fish and every cast can bring either fish to hand. Once the crabs leave the mud and the baitfish show the holdover fish revive to the condition of their newly arrived migrating brothers and sisters. By May all bets are off as to whose who except those rare fish that held over in the small creeks and estuaries and made it through the freezes and the kills that resulted of those freezes.
I once went 22 months straight catching bass on the Cape and in those 22 months I found I had a lot of time to speculate on why certain fish in certain locations faired better than others ( mainly because I was the only nut out trying in most places). All of the above was the result of my time on the water in frigid January snow squalls, bone chilling nortwest winds in February and drizzly cold dyas in March. As cast after cast was made I was given to thinking why I was there and why the fish were there and what was happening to them in those conditions. I caught fish after fish one day in Barnstable Harbor in February with Dave LaPorte in 26 degrees and spitting snow that were fat and happy and other days I caught fish in tidal creeks that looked like they came out of a Hollywood horror flick and was afraid to even touch them as I released them. I learned an awful lot about them and myself.
|